Uncategorized

How to Prevent Concrete Cracking? You just invested thousands of dollars into a beautiful new concrete pathway. Fast forward one year, and spiderweb cracks are spreading across the surface like fault lines after an earthquake. Your heart sinks as you realize those cracks will only get worse with every freeze-thaw cycle Fredericton’s winters throw at them. Concrete cracking is one of the most frustrating problems property owners face across Canada, and it’s often completely preventable. The difference between concrete that lasts decades and concrete that cracks within seasons comes down to understanding what causes these failures and taking the right steps from day one. In this guide, you will discover exactly how to prevent concrete from cracking in Canadian climates. We’ll walk through the critical preparation steps, proper materials and techniques, ongoing maintenance strategies, and when it’s time to bring in professionals like Atlantic Brick and Stone. Whether you’re planning a new installation or trying to protect existing concrete, you’ll learn proven methods to keep your concrete solid for long time. What causes concrete to crack? Before you can prevent concrete cracking, you need to understand your enemy. Several factors work together to stress and eventually fracture concrete surfaces, and many of them are particularly harsh in Fredericton’s climate. Environmental factors top the list of concrete destroyers. Freeze-thaw cycles occur when water seeps into tiny concrete pores, freezes, and expands by roughly nine per cent. This expansion creates immense internal pressure that forces the concrete apart. When you combine this with extreme temperature fluctuations between summer heat and winter cold, your concrete experiences constant expansion and contraction that generates stress over time. Seasonal ground movement adds another layer of challenge as soil beneath your concrete shifts with temperature and moisture changes. Material issues create vulnerabilities from the inside out. When the water-cement ratio in your concrete mix is wrong, you end up with weak concrete that can’t withstand normal stresses. Low-quality aggregates (the sand and gravel in concrete) create weak spots throughout the material. An inadequate overall mix design sets you up for failure before the concrete even hits the ground. Structural problems beneath the surface cause just as many headaches. Insufficient sub-base preparation means your concrete sits on unstable ground. When soil isn’t properly compacted or contains organic material that decomposes over time, you get uneven settling that creates stress points. Foundation settling happens when the ground beneath concrete sinks unevenly, forcing the rigid concrete to crack as it tries to follow the movement below. Construction defects during installation doom even good concrete to early failure. Rapid drying during the curing process prevents concrete from developing its full strength. Improper finishing techniques can weaken the surface layer. Missing control joints (those intentional grooves you see in sidewalks) mean concrete cracks randomly instead of in controlled locations. Excessive loads stress concrete beyond its design capacity. Parking a heavy recreational vehicle on a residential driveway designed for cars creates point loads that can crack the concrete. Even repeated loads from delivery trucks can progressively damage concrete not engineered for that weight. Chemical exposure slowly eats away at concrete integrity. De-icing salts like calcium chloride and sodium chloride corrode concrete surfaces, particularly during winter months. Certain fertilizers containing ammonium nitrate or ammonium sulfate actually attack concrete chemically and should never be used near concrete surfaces. Atlantic Brick and Stone’s 15+ years of experience means we’ve seen every one of these failure modes firsthand. Our approach addresses each potential cause through careful sub-base preparation, quality materials, proper construction techniques, and comprehensive curing procedures that give your concrete the best possible start. How to prevent concrete from cracking? Preventing concrete cracks requires attention to detail at every stage of your project. From the ground preparation to the final curing steps, each phase plays a critical role in creating durable, crack-resistant concrete. Proper sub-base preparation The ground beneath your concrete determines whether it will last five years or fifty years. Think of the sub-base as the foundation for your foundation—get it wrong, and everything built on top is compromised. Start by removing every trace of topsoil and organic material until you reach stable ground. Topsoil contains roots, leaves, and decomposing matter that will break down over time, creating voids beneath your concrete. These voids lead directly to settling and cracking. Don’t cut corners here—dig down to solid, stable soil even if it means more excavation than you planned. Next, bring in well-compacted granular fill made from crushed stone. This material provides a stable, drainage-friendly base that won’t shift or settle. The key word is “compacted.” Loose stone will settle under the concrete’s weight and cause cracking within months. Professional crews use plate compactors or vibratory rollers to compress the stone in layers, typically compacting each 100-150 millimetre layer before adding the next. This creates uniform support across the entire area. Your sub-grade must be sloped properly to move water away from the concrete rather than letting it pool underneath. Water accumulation beneath slabs leads to erosion, freeze-thaw damage, and soil movement—all recipes for cracks. A slope of just one to two per cent (about 3 to 6 millimetres per metre) is usually sufficient to keep water moving. Thickness requirements vary by application: Residential driveways: 100 to 150 millimetres of compacted stone base Commercial applications: 200 millimetres or more for heavier loads High-traffic areas: Additional depth based on soil conditions Atlantic Brick and Stone conducts proper soil investigation and designs the sub-base to match your specific soil conditions and intended use. Cutting corners on sub-base preparation to save a few hundred dollars often costs thousands in repairs within just a few years. Optimized concrete mix design The concrete mix itself makes or breaks your project’s long-term success. Even perfect installation can’t overcome a poorly designed mix, while a properly formulated mix gives you significant insurance against cracking. The water-cement ratio stands as the single most critical factor in concrete strength. Too much water makes concrete weak, porous, and prone to shrinkage cracks. Too little makes

Ventilation for chimneys – 7 essential facts for home safety It’s a frigid January evening in Fredericton, and you’ve just lit your fireplace to warm up after shoveling snow. Instead of drawing the smoke up and out, your chimney sends it billowing back into your living room. Your eyes water, your smoke detector screams, and you’re left wondering what went wrong. This scenario happens more often than you’d think. Proper ventilation for chimneys isn’t just about comfort—it’s a critical safety issue that protects your family from carbon monoxide poisoning, prevents house fires, and preserves your home’s structural integrity. When chimney ventilation fails, the consequences can be dangerous and expensive. In this article, we’re covering seven essential facts every homeowner needs to know about chimney ventilation. You’ll learn how your chimney actually works, what warning signs demand immediate attention, and how to maintain safe, efficient operation throughout Atlantic Canada’s harsh winters. Atlantic Brick and Stone has served Fredericton and surrounding areas for over 15 years, and we’ve seen firsthand what happens when chimney ventilation is ignored—and how proper care can be for home safety and peace of mind. Fact 1: How chimney ventilation actually works Your chimney isn’t just a brick tube leading to your roof. It’s a carefully engineered system that relies on physics to protect your home. The science behind proper chimney ventilation starts with something called the chimney effect, or stack effect. When you light a fire, the warm air and combustion gases rise naturally because they’re less dense than the cooler air around them. This creates an upward draft that pulls smoke and harmful gases out of your home. The strength of this draft depends on several factors working together. The temperature difference between inside and outside air drives the entire process—the greater the difference, the stronger the draft becomes. That’s why chimneys often work better on cold winter days than mild autumn evenings. Your chimney’s height matters too. A taller chimney creates more draft because there’s more vertical distance for the warm air to travel. The size of your flue also plays a key role in chimney airflow. A flue that’s too large allows gases to cool before they exit, weakening the draft. A flue that’s too small restricts airflow and can’t handle the volume of smoke your fireplace produces. Modern high-efficiency heating systems create special challenges because they produce cooler exhaust gases than older appliances. These cooler gases don’t rise as readily, which can lead to condensation problems and reduced draft. Understanding these principles helps you recognize when something’s wrong. If your fireplace suddenly struggles to draw smoke on a cold day when it should work best, you’re likely dealing with a blockage or structural issue that needs professional attention. The chimney effect is reliable when everything’s working properly, but it’s also unforgiving when components fail or deteriorate. Fact 2: Poor chimney ventilation creates serious health and safety risks Inadequate chimney ventilation isn’t just an annoyance—it’s a genuine threat to your family’s health and your home’s safety. Carbon monoxide poisoning tops the list of dangers. This odorless, colorless gas is produced whenever fuel burns, and your chimney’s job is to expel it safely outdoors. When ventilation fails, carbon monoxide seeps into your living spaces instead. Low-level exposure causes headaches, dizziness, and nausea. High-level exposure can be fatal. Regular smoke exposure from fireplace smoke issues creates respiratory problems even when carbon monoxide isn’t involved. The particulates and irritants in wood smoke damage lung tissue, trigger asthma attacks, and worsen existing respiratory conditions. Children and elderly family members face the highest risk. If you’re smelling smoke in your home after lighting your fireplace, you’re breathing harmful pollutants that should be going up your chimney. Fire risks escalate dramatically with poor ventilation. When smoke doesn’t draw properly, it often means creosote is building up inside your flue. Creosote is a tar-like substance that forms when wood smoke condenses on cool chimney surfaces. It’s extremely flammable, and once ignited, it burns at over 1,000 degrees Celsius—hot enough to crack masonry, melt metal components, and spread fire to your home’s structure. Chimney fires sound like freight trains roaring through your house, and they cause millions of dollars in property damage across Canada every year. Structural damage develops more slowly but no less seriously. Moisture problems from condensation deteriorate mortar joints, crack clay tiles, and cause brick to spall and crumble. Water stains on exterior masonry, white crystalline deposits called efflorescence, and persistent dampness in your attic all signal that your chimney ventilation system isn’t managing moisture properly. Common warning signs include: Smoke backing up into rooms when you open the fireplace doors Difficulty getting fires started or keeping them burning Strong downdrafts that blow cold air into your home Soot accumulation around the fireplace opening A persistent smell of smoke even when the fireplace isn’t in use Atlantic Brick and Stone’s comprehensive inspection services identify these problems before they become dangerous, giving you the information you need to protect your family and your investment. Fact 3: Chimney draft problems have identifiable causes and practical fixes When you’re experiencing chimney draft problems, there’s always a reason. Blockages and obstructions are among the most common culprits. Birds build nests in chimney tops during spring and summer, creating barriers that prevent smoke from escaping. Leaves, branches, and other debris accumulate over time, especially if you don’t have a properly fitted chimney cap. Excessive creosote buildup can narrow the flue to the point where airflow becomes severely restricted. In older chimneys, clay liner sections sometimes collapse entirely, creating complete blockages that require professional removal. Structural issues compromise ventilation in ways that aren’t always obvious from the outside. Cracks in masonry allow air to leak in at the wrong points, disrupting the smooth upward flow of gases. Deteriorating mortar joints create the same problem. A damaged chimney crown—the concrete or mortar top that seals the space between your flue and the outer chimney structure—lets water penetrate, leading to internal damage that affects draft. Improper

How to fix vertical concrete cracks You are inspecting your basement after Fredericton’s harsh winter, and you notice a thin vertical line running down your foundation wall. At first glance, it seems harmless. But as spring’s snowmelt arrives, you discover moisture seeping through that same crack, pooling on your basement floor. What started as a hairline fracture has become a pathway for serious water damage. Vertical concrete cracks are different beasts entirely from their horizontal counterparts. While a crack in your driveway might accept a simple self-levelling product, that same material will literally run down your basement wall before it even begins to cure. Gravity isn’t just a minor inconvenience in vertical repairs, it’s the fundamental challenge that separates successful, lasting repairs from complete failures that waste your time and money. In Atlantic Canada’s challenging climate, where temperatures swing from -25°C in January to +30°C in July, your concrete endures relentless freeze-thaw cycles. Each cycle drives water deeper into cracks, where it freezes and expands by approximately 9%. This expansion force slowly tears your concrete apart from the inside. Without proper intervention using materials and techniques specifically designed for vertical applications, these cracks progressively worsen until you’re facing structural damage that costs thousands to remediate. This guide reveals the professional-grade vertical concrete crack repair methods that Atlantic Brick and Stone has refined over 15 years of serving Fredericton homeowners and commercial property owners. You’ll discover which materials actually work on vertical surfaces, when specialized waterproofing systems are necessary, and how to distinguish between minor repairs you might tackle yourself versus situations demanding certified expertise. Most importantly, you’ll learn how to protect your property investment with repairs that actually last through Canadian winters. Vertical concrete cracks in Canadian climates Concrete in the Fredericton region faces environmental conditions that accelerate deterioration. Seasonal temperature fluctuations create a punishing cycle of contraction and expansion, stressing weaknesses and turning minor imperfections into visible cracks that grow with each season. Freeze-thaw cycling represents the most destructive force on concrete in Atlantic Canada. When water infiltrates cracks and freezes, it expands approximately 9%, generating pressure that exceeds concrete’s tensile strength. The crack widens, more water penetrates, and the cycle repeats 30 to 50 times each winter. Vertical cracks appear in several common locations: Foundation wall cracks often indicate settlement, hydrostatic pressure, or inadequate drainage Basement wall cracks may signal excessive moisture, poor construction, or structural movement Retaining wall cracks frequently result from soil pressure, poor drainage, or insufficient reinforcement The location and pattern provide diagnostic information for addressing root causes rather than cosmetic symptoms. Early spring presents the critical window for assessment. After snowmelt saturates the ground, active water infiltration becomes obvious through damp spots, efflorescence, or seepage. This reveals whether last year’s small crack has become a genuine problem. Visual inspection should measure crack width using a comparator card or ruler. Hairline cracks under 1mm may be cosmetic. Cracks between 1-3mm warrant monitoring and sealing. Anything exceeding 6mm demands professional evaluation, often indicating significant movement or failure. Look for water staining, rust deposits suggesting reinforcement corrosion, or displacement where one side sits higher. These signs elevate a crack from minor maintenance to structural concern. Pattern matters tremendously. A single vertical crack might represent normal shrinkage. Multiple interconnected cracks forming step patterns, horizontal components, or map cracking suggest serious issues like foundation failure or excessive settlement. Atlantic Brick and Stone’s certified specialists routinely assess these patterns to determine appropriate intervention. Why standard concrete repair products fail on vertical surfaces Walk into any hardware store, and you’ll find concrete repair products claiming to fix “all cracks.” What labels rarely mention is that many are formulated for horizontal surfaces and will fail on vertical walls. The fundamental challenge is gravity. Self-levelling sealants and fast-setting polyurethanes work on garage floors because gravity helps them flow into cracks. Apply that same product to a vertical wall, and it runs down in streaks, never filling the crack. You’re left with a mess on the floor and an unsealed crack still allowing water infiltration. Manufacturers state these limitations in technical sheets, though retail packaging obscures this information. Fast-setting products explicitly note “not suitable for vertical crack applications” in their documentation. Yet homeowners purchase them expecting universal application, leading to predictable failure. Rigid cementitious products represent another common mistake. Traditional concrete patching compounds create hard, inflexible repairs that seem logical. The problem emerges during seasonal temperature changes. As your foundation expands and contracts, rigid patches cannot accommodate this movement. They break loose from surrounding material, often in larger chunks than the original crack, leaving you worse off than before. Three critical properties define successful vertical crack repair materials: Non-sag viscosity ensures the material stays in place rather than flowing downward before curing Flexibility after curing allows the repair to move with seasonal concrete expansion without losing adhesion Proper adhesion to damp concrete proves necessary because vertical cracks, especially in foundations, exist in perpetually moist conditions where dry-only adhesives fail Atlantic Brick and Stone specifies professional-grade polyurethane sealants because they deliver all three requirements. The paste-like consistency resists gravity. The rubber-like texture accommodates movement. The formulation bonds effectively to damp substrates. This isn’t about expensive materials—it’s about matching product capabilities to vertical application demands. Professional-grade materials for lasting vertical crack repairs Material selection separates repairs lasting 10-20 years from those failing within months. Atlantic Brick and Stone matches specific repair systems to individual conditions through thorough crack assessment. Non-sag polyurethane sealants like Vulkem 116 serve as the industry standard for dry vertical cracks in foundations and retaining structures. These materials maintain position on vertical surfaces with thicker viscosity throughout application and curing. They achieve a flexible, rubber-like consistency accommodating ±25% movement in Canadian climates without breaking bonds. Properly applied, these sealants provide 10-20 years of service life, withstanding freeze-thaw cycles and temperature extremes from -40°C to +80°C. Standard 300ml cartridges fit professional caulking guns for precise control. Proper technique starts at the crack’s bottom, working upward to prevent air pockets, with immediate tooling for

How to Repair Concrete Garage Floors? A concrete garage floor feels solid underfoot, yet over the years small cracks, pits, and rough patches start to show up. That first thin line across the slab might not seem like a big deal. For many homeowners, concern begins only when pieces start to chip away or the car bumps over a low spot near the door. That is where careful concrete garage floor repair makes a real difference. In New Brunswick, garages work hard. Freeze–thaw cycles, road salt, heavy vehicles, and years of use all push concrete to its limits. When cracks stay open, water slips in, freezes, and forces them wider. Spalling, pitting, and crumbling can follow. Left alone, what began as a hairline defect can lead to uneven slabs, safety hazards, and even discussion of full garage slab replacement. Most garage floors can be saved. Once the cause and type of damage are clear, it becomes much easier to repair a garage floor in a smart way. This guide walks step by step through inspection, DIY crack fillers, epoxy repair, advanced methods such as slab jacking and foam injection, and long‑term maintenance like garage floor resurfacing. With more than sixteen years of hands‑on experience around Fredericton, Atlantic Brick and Stone shares what works in this climate so a homeowner can decide when to try DIY repair and when to call a concrete specialist. By the end, you will know how to spot different damage types, how to fix garage floor cracks with the right materials, what affects garage floor crack repair cost, and how to keep a repaired floor in good shape for many years. What causes cracks and damage in concrete garage floors? Concrete looks solid, yet it moves and reacts to its environment more than most people expect. Many cracks in a garage floor start right after the pour, while others show up slowly over several winters. Understanding why damage appears helps with both repair and prevention. Common causes include: Natural shrinkage during curing – As fresh concrete dries, it loses moisture and pulls inward. This movement creates internal stress, which often shows up as fine hairline cracks. They may seem minor, yet each one can allow water and salt into the slab. Soil and base issues – If the base was not compacted well, or if drainage sends water under the slab, the ground can settle or wash away. Voids form and the concrete above drops, which leads to wider cracks or whole sections that sink. In New Brunswick clay soils, that movement can continue for years. Climate and freeze–thaw cycles – Water that seeps into even tiny gaps freezes in winter and expands, pushing cracks wider and breaking off surface layers. De‑icing salt from vehicle tires speeds up this breakdown and leads to pitting, spalling, and concrete that feels rough and brittle. Heavy loads and poor installation – Large trucks, loaded shelving, or a heavy workbench that rests on small feet all focus stress into a small area. If the slab is thin, the mix had too much water, or control joints were poorly placed, the floor responds badly to that stress. Vibration from frequent traffic and normal building settlement adds more strain. All of these causes show up on the surface in different ways, which the next section explains. How do you identify different types of garage floor damage? Not every defect means the same thing, and not every crack points to structural trouble. A quick, careful look at the floor helps sort minor cosmetic issues from damage that needs professional attention. Key damage types include: Hairline cracks – Faint, pencil‑thin lines that often cross an otherwise sound slab. They usually come from early shrinkage and often stay shallow. On their own they rarely signal major failure, yet they still act as tiny channels for water and salt. In a Canadian winter that is enough to start long‑term damage. Medium to large cracks – When a gap is as wide as a credit card or more, or when a crack seems deep, it often ties back to soil settlement, heavy loading, or movement in the foundation. If one side of the crack sits higher than the other, the slab has shifted and there is a clear sign of movement below the surface. Spalling and pitting – Spalling shows up as flaking or chipping of the top layer of concrete. The surface may look rough, with thin flakes lifting off, especially near the garage door where snow and salt drip from vehicles. Pitting appears as small round holes or shallow depressions scattered across the floor. Both conditions often trace back to freeze–thaw cycles, de‑icing chemicals, or a weak surface finish. Uneven or sunken slabs – A wheel that drops as it crosses the floor, or a visible slope toward one corner, usually means the soil below has settled or washed out. Patterns also matter. A single straight crack that follows a control joint is less worrying than a web of random cracks or several lines that grow over time. When damage looks extensive, or when cracks keep changing, a professional assessment from a team like Atlantic Brick and Stone is a wise next step. Why is it critical to repair garage floor cracks promptly? Concrete damage rarely stays frozen in time. Once a crack or surface defect appears, each freeze–thaw cycle and each season of salt and moisture adds more stress. Quick concrete garage floor repair keeps a small problem from turning into a major project. Open cracks allow water to reach the interior of the slab and even the base material below it. During winter that trapped moisture freezes and pushes the crack wider. Over several years, the surface can start to scale, pit, and crumble. At that stage, a homeowner may face not just crack repair, but full garage floor resurfacing or even garage slab replacement. Safety and use of the space suffer as well: Raised edges near cracks create trip hazards. Wheels

Masonry Lintel Repair Guide At first glance, the rows of brick or stone around a window look solid and simple. Hidden inside that wall is a small horizontal support called a lintel, quietly carrying thousands of pounds of weight. When that support starts to fail, cracks, sticking windows, and sagging brick can follow fast. This masonry lintel repair guide explains what is happening behind those cracks and what to do before the damage spreads. Lintels sit above door and window openings and transfer the load of the wall to the masonry on each side. They can be made from steel, concrete, brick, stone, or timber, and each material reacts differently to moisture, age, and Fredericton’s freeze and thaw cycles. When a lintel weakens, bricks can shift, frames can bend, and in serious cases a section of wall can fail. Even small changes around openings are a sign that the structure deserves a closer look. Homeowners often first notice small step cracks or a bit of rust and assume it is only cosmetic. In reality, those early lintel failure signs are a warning that the structure needs attention. Dealing with the problem early is far less stressful and far less expensive than waiting until a full steel lintel replacement or major brick rebuild is needed. In the sections ahead, this masonry lintel repair guide walks through what a lintel does, how different materials fail, the warning signs to watch for, repair versus replacement options, typical lintel replacement cost ranges, and simple maintenance habits. With more than fifteen years of hands-on masonry experience across Fredericton and nearby communities, Atlantic Brick and Stone helps homeowners with professional lintel repair, careful brick matching, and clear, no-pressure advice. For anyone worried about a crack over a window or door, we also offer free estimates so the next step feels clear and manageable. What is a masonry lintel and why does it matter? A masonry lintel is a horizontal support that spans the top of an opening in a brick, block, or stone wall. It sits just above a window or door and carries the weight of everything built above that gap. Without a proper lintel, the wall would try to push straight down into the opening, which a window or door frame is not built to handle. The job of the lintel is to collect the load from the bricks or stone above and spread that weight into the solid wall on each side. When it is sized and installed correctly, the lintel keeps the wall stable and straight. It also keeps that load off the frame so windows and doors can open and close freely for decades. In many houses, the lintel hides one or two courses above the window or door, buried behind brick or stone facing. That makes it easy to forget, right up until the day the wall starts showing signs that the hidden support is in trouble. When a lintel starts to fail, the support it provides becomes uneven or disappears in the middle of the span. Bricks can begin to tilt, mortar joints can crack in a stair-step pattern, and the wall above the opening may start to sag. In extreme cases, part of the wall can separate or collapse, which turns a small crack into a serious safety risk. Lintels can also have a decorative side, especially on older homes where shaped stone, patterned brick, or soldier courses draw the eye. Even when they look decorative, they are still structural pieces that should never be ignored. If there is any doubt about how well a lintel is performing, a professional inspection is the safest way forward. Common lintel materials and their vulnerabilities Around Fredericton, many masonry openings are supported by five main lintel materials. Steel, concrete, timber, stone, and brick each respond in their own way to moisture and freeze and thaw cycles. Weather that works into the wall can weaken, crack, or rust any of them. Steel lintels are common in newer brick homes because they are strong and able to span wide windows and doors. Their main weakness is corrosion once water gets past paint or flashing. As the steel rusts it swells, a process often called rust jacking, and that expanding metal can crack mortar, push bricks outward, and create the need for sagging lintel repair or full steel lintel replacement. Concrete lintels are usually precast with steel bars buried inside. They carry heavy loads well and are fire resistant, yet they are heavy and can crack if the support underneath is uneven. When water reaches the hidden rebar it can rust and expand, breaking the concrete from the inside and leading to concrete lintel repair or replacement work. Timber lintels tend to show up in older or cottage-style homes. Wood is light and easy to work with, but it has less strength than steel or reinforced concrete and it does not tolerate long-term moisture. Rot, insect damage, and warping can all reduce its capacity long before a clear crack forms in the surrounding brick. Stone lintels are often used on heritage buildings where the look of carved stone above a window is part of the design. They can last a long time but can also be brittle, and small natural flaws may grow into cracks when the building settles or water in fine joints freezes in winter. Brick lintels use bricks to bridge small openings, sometimes with a hidden steel angle or bar taking much of the load. On their own, bricks can only carry light loads over short spans, so when mortar washes out or the hidden steel rusts, brick lintel repair often means reinforcing the visible bricks and the support behind them. Knowing which material you have is the first step toward choosing the right repair method and spotting which risks—rust, rot, or cracking—are most likely over time. Warning signs your lintel is failing Lintel problems rarely appear overnight. The wall usually shows clues before bricks become loose or a window

What Causes Concrete Pitting? Picture walking across a front step or driveway in late March and noticing that the smooth concrete poured a few years ago now looks pockmarked and rough. Tiny holes, flaky patches, and loose stones catch the light and raise a frustrating question. Many property owners in New Brunswick end up asking the same thing every spring: what causes concrete pitting, and why does it seem to happen so fast? Concrete pitting and related concrete surface damage, like scaling and spalling, are very common in Fredericton’s freeze-thaw climate. The top layer of concrete starts to peel, chip, or form small craters, turning a clean slab into a patchy, worn-looking surface. At first it may seem cosmetic, but over time those concrete surface holes can grow deeper, leading to larger chunks breaking away and even creating safety issues. Behind that damage there is usually a mix of causes. Weather, deicing salts, concrete mix quality, and installation practices all play a part. New concrete problems can show up in only a winter or two if the wrong mix was used or the base was not prepared properly. Understanding these concrete deterioration causes is the first step toward concrete pitting prevention and long-lasting repair. Atlantic Brick and Stone has been helping Fredericton homeowners, commercial property managers, and heritage building owners deal with concrete surface defects for more than 15 years. In this guide, you will see how concrete pitting starts, what really causes it, how to assess the damage, and which repair options make sense. You will also see where simple maintenance is enough and when it is time to call the Atlantic Brick and Stone team for a free assessment and professional plan for fixing pitted concrete. What is concrete pitting and how does it appear? Concrete pitting is the formation of small holes or depressions in the surface of a slab. These pits can be just a few millimetres across or large enough to catch a shoe heel or snow shovel. They often appear alongside other concrete surface damage, such as flaking and thin chips coming off the top layer. Pitting is closely related to scaling, which is the gradual loss of the surface layer of concrete. As scaling progresses, the smooth paste at the top wears away and exposes the coarse aggregate, the small stones inside the mix. That is why a damaged concrete driveway or patio often looks patchy and speckled, with rough stones showing through in certain spots while other areas are still smooth. Homeowners should watch for: Shallow peeling or “shelling” of the surface Thin flakes breaking off the top layer Scattered stones appearing on top of the slab Small concrete surface holes that grow from season to season Over time, these spots can deepen into visible craters and larger voids. Driveways, concrete walkways, patios, front steps, and garage floors are the most common places to see this kind of wear because they take the heaviest traffic and weather. Catching pitting early makes repairing the concrete surface easier and less expensive, which is why Atlantic Brick and Stone offers free assessments and pit depth measurements before the damage spreads. The primary environmental causes of concrete pitting Freeze-thaw cycles and how they destroy concrete surfaces Concrete may feel solid, but at a microscopic level it is full of tiny pores and capillaries. Water from rain, melting snow, or slush seeps into these spaces and sits just below the surface. In Fredericton, where temperatures often move above and below zero in the same week, this moisture becomes a major source of concrete freeze-thaw damage. Here is what happens during a typical cycle: Water soaks into the pores near the surface. Temperatures drop below freezing. Water turns to ice and expands by about nine percent. That expansion creates pressure inside the cement paste. Repeated cycles cause the surface to weaken and break apart. On a single night this might not do much, but over dozens of freeze-thaw cycles each winter, the pressure repeatedly pushes against the surface layer and weakens it. As the surface weakens, it starts to break apart in thin sheets or chips, and small pits form where the paste has been pushed out. This process is a major reason for concrete scaling problems and is one of the most common concrete deterioration causes in our climate. Slabs that do not drain properly, or that have low spots where water pools, are hit harder because they stay wet longer. During a concrete evaluation, Atlantic Brick and Stone always checks slope, drainage patterns, and nearby downspouts to see whether water management is adding to the pitting. The damaging effects of deicing salts and chemicals Deicing salts and chemicals are another major cause of concrete surface damage. Rock salt, or sodium chloride, is widely used on driveways and walkways, but it is hard on concrete. These products lower the freezing point of water on the surface, which may sound helpful for ice control but also increases the number of freeze-thaw cycles the concrete goes through. Salts are hygroscopic, which means they pull moisture toward them and hold it. When salt is spread on a slab, more water is drawn into the concrete’s pores and stays there longer. That extra moisture gives freeze-thaw action more material to work with, which speeds up the breakdown of the cement paste and leads to more pits and flakes. Over time, some deicing chemicals also react with the cement itself and weaken the surface, adding chemical attack on top of mechanical damage. The combination of: More moisture entering the slab More frequent freeze-thaw cycling Direct chemical softening of the surface creates a perfect recipe for concrete pitting and spalling. Safer options include concrete-friendly products such as calcium magnesium acetate for melting, and sand for traction. Atlantic Brick and Stone regularly advises clients to limit salt use on new and existing slabs and to rinse away salt residue during mild spells to reduce long-term damage. Installation and material deficiencies that lead to

What Causes Efflorescence on Brick Many brick owners first notice a problem on a wet spring morning. After the rain dries and sun appears, the lower part of a brick wall looks dusted with flour. That white powder on bricks brushes off easily, and new white stains on brickwork return after the next wet spell. Those chalky patches are called efflorescence—crystalline salt deposits that form on brick, block, and concrete. Many search online for what causes efflorescence on brick hoping it is only surface staining. While it looks minor, it always signals moisture in brick walls moving where it should not. In Fredericton’s climate, with heavy rain, snow melt, and strong freeze–thaw cycles, brick efflorescence is common. The salt itself is harmless, but warns that water is travelling through your masonry. Left unchecked, that water can cause spalling brick, crumbling mortar, damp basements, and interior mould. Understanding what causes efflorescence on brick matters for both appearance and structure. Atlantic Brick and Stone has spent over 15 years working on brick, stone, and concrete across Fredericton and nearby communities. Our team sees efflorescence weekly on everything from older foundations to new veneer walls. This article explains what those white marks on bricks mean, the conditions that create them, common moisture sources, and how we address both the stain and root cause. By the end, you will be able to: recognize early signs of brick turning white connect those signs to likely moisture sources decide when to call a professional such as Atlantic Brick and Stone What is efflorescence? Efflorescence is the name for the crystalline deposits on masonry that show up as white, chalky, or powdery patches on brick, block, or concrete. Sometimes the salts look like a thin film. Other times they grow as tiny whiskers or a crusty build‑up. Whether the wall is red brick, stone, or grey concrete, the deposit itself is usually white and easy to smear with a finger. Chemically, efflorescence comes from water‑soluble salts that are already in the masonry. Common ones include calcium sulphate, sodium sulphate, potassium sulphate, and calcium carbonate. These minerals can be in the brick clay, the Portland cement in mortar, the sand and aggregate, or even in surrounding soil. On their own, while the wall stays dry, these salts sit quietly inside the material and do nothing. Brick and mortar are full of tiny pores and channels, almost like a sponge made of stone. This is why masonry can soak up water and why moisture in brick walls can travel quite far. When water gets into the wall, it dissolves the salts and turns them into a salty solution. That solution moves through those pores toward the nearest drying surface; most often, that means the outside face of the wall. At the surface, the water meets the air and evaporates. The salts cannot evaporate, so they stay behind as brick salt deposits. That is the white film people see when they ask what causes efflorescence on brick in the first place. Because this movement depends on moisture, efflorescence is often heaviest after a period of rain followed by a dry, sunny day. Efflorescence is often confused with mould or paint residue. A simple test helps tell it apart: If a little white powder fizzes when a few drops of vinegar touch it, it is almost certainly mineral salt. Mould does not fizz and will smear or stain instead. Atlantic Brick and Stone often starts with quick checks like this before planning any efflorescence removal or repair work. There are two broad types of efflorescence. Primary efflorescence is common on new walls as construction moisture dries out. Secondary, or recurring, efflorescence shows up later in the building life and points to an ongoing water source. In both cases, the white deposit itself is not the main issue. It is the sign that water is moving through your brickwork. The three essential conditions required for efflorescence formation Efflorescence on brick does not just appear at random. Three things must happen at the same time for those white stains on brickwork to show up: there must be salts inside the masonry there must be enough water to dissolve and move them there must be a way for that water to reach a drying surface where it can evaporate If any one of these three parts is missing, there will be no visible brick efflorescence. Understanding this three‑part pattern is very helpful when trying to answer what causes efflorescence on brick on a specific house or building. Homeowners and property managers can rarely control the salts that are already in older masonry, but they can control moisture and evaporation paths. That is why Atlantic Brick and Stone always looks closely at these three conditions during an inspection. Presence of water-soluble salts in masonry materials Every brick wall contains some amount of mineral salt. The clay used to form bricks often carries calcium, sodium, potassium, and magnesium compounds. Portland cement in mortar and concrete adds more sulphates and carbonates. Even the sand and stone used in mixes can come with their own natural salts, depending on the source. These salts do not cause white powder on bricks until they meet water. Dry bricks can hold a fairly high salt content while still looking perfectly clean. The salts stay “locked” inside the structure of the brick or mortar and do not move very far. Once moisture reaches them, though, they can dissolve into a solution and start to migrate. Salt content can differ from one brick manufacturer to another. Mortar recipes and concrete mixes also vary in how much soluble salt they contain. In some areas, local aggregates add more salts to the mix. Atlantic Brick and Stone takes this into account on new projects, choosing quality bricks and low‑salt mortar and concrete mixes whenever possible. That choice cannot remove efflorescence risk completely, but it does lower the amount of material available for future brick salt deposits. Sufficient moisture to dissolve and transport the salts

How Often to Clean Chimney A quiet winter night, a crackling fire, and a warm living room can hide a serious risk in the walls above the flames. The question of how often to clean chimney is not just about keeping things tidy. It is about preventing chimney fires and carbon monoxide from entering the home. Many property owners assume an occasional sweep is enough, or that a chimney that “looks fine” must be safe. In reality, every fire leaves residue behind, and over time that residue builds into a real hazard. The National Fire Code of Canada warns that only a few millimetres of creosote can be enough to start a dangerous fire inside the flue. Atlantic Brick and Stone has spent more than 15 years helping Fredericton homeowners, building owners, and contractors keep their chimneys safe and structurally sound. This guide explains how often to schedule fireplace chimney cleaning, how usage and fuel type affect your chimney cleaning schedule, what warning signs to watch for, and how professional inspection and repair fit into overall chimney safety. By the end, it will be clear when to clean a chimney yourself, when to call a professional chimney sweep, and how Atlantic Brick and Stone can help keep your system in safe working order. Why chimney cleaning is essential for home safety? Every time wood burns, it releases smoke, vapour, and tiny particles that rise into the chimney. As these gases cool, they stick to the inner walls and form creosote, a black or brown residue that can be flaky, sticky, or shiny. This material is highly flammable, and once it reaches about 3 millimetres in thickness, the National Fire Code of Canada treats it as a serious fire risk. When creosote ignites, the fire races up the chimney like a blowtorch. Temperatures can climb high enough to crack tiles, damage stainless liners, and even allow flames to reach nearby framing in the attic or walls. What starts as a small wood fire in the living room can become a full structural fire in minutes if the flue is coated with heavy buildup. A dirty or blocked chimney also raises the risk of carbon monoxide entering living spaces. If the flue is narrowed by creosote, animal nests, or debris, smoke and gases can spill back into the room instead of venting outside. Carbon monoxide is colourless and odourless, so a working detector is non‑negotiable for any fuel‑burning appliance. Regular chimney safety inspection and creosote removal reduce these risks, and professional inspection from a company like Atlantic Brick and Stone also reveals cracks, loose masonry, and liner problems that threaten long‑term safety. Recommended chimney cleaning frequency by appliance type Homeowners should schedule a professional chimney sweep for chimney inspection and cleaning at least once yearly for solid-fuel appliances. This annual cleaning ensures safety before each heating season and is necessary even for occasional use, as creosote accumulates, animals nest in idle chimneys, and debris builds up. While gas fireplaces produce less soot, they still require annual gas fireplace chimney maintenance. Moisture from gas appliances can corrode liners and metal components over time. Yearly inspections verify the venting system is clear, the liner is intact, and no condensation damage exists. The ideal chimney sweeping frequency varies based on actual usage patterns. Heavy wood burning, occasional fires, and daily gas inserts each place different demands on a chimney. Understanding your specific appliance type and usage helps create an appropriate fireplace service schedule for your home’s needs. For quick reference: Wood stoves and inserts used as primary heat: inspect and clean at least once a year, often twice. Open fireplaces used regularly: clean every two years, with inspection every year. Occasional‑use fireplaces: cleaning every three to four years, with annual inspection. Gas fireplaces and gas inserts: annual inspection with cleaning every two to three years, depending on use and design. Wood stoves and fireplace inserts Wood stoves and fireplace inserts often do the hardest work in a house. Many Fredericton homeowners rely on them as a main or backup heat source through long winters. That steady burn means creosote can appear quickly, so these systems always need at least one professional chimney sweep visit every year. If the stove or insert runs most days during the heating season, a single annual cleaning may not be enough. In high‑use houses, a mid‑season cleaning in January or February is often wise. This keeps creosote under control and lowers the chance of a chimney fire during the coldest months, when the stove is working the hardest. Wood burning fireplace maintenance for stoves and inserts should always include a close look at the liner. Atlantic Brick and Stone can inspect, clean, and repair liners, checking for cracks, gaps, or corrosion that a basic sweep might miss. That combination of fireplace chimney cleaning and structural review provides much stronger protection than a quick brush‑out alone. Open fireplaces based on usage Open fireplaces tend to burn less intensely than stoves, but they still leave soot and creosote behind. For a fireplace that sees regular use, such as several evenings a week through winter, a cleaning every two years is a good target. That schedule keeps creosote layers thin enough that they do not reach the danger level between visits. “Occasional use” usually means a few fires a month, or mostly holiday and special‑event fires. In that case, cleaning every three to four years is usually enough, as long as an annual chimney inspection still takes place. That inspection checks for animal nests, falling tiles, and moisture damage that may have nothing to do with how often you burn. Even a fireplace that never gets used still needs attention. Unused chimneys often collect birds’ nests, wasp nests, and wind‑blown debris. Damp conditions can also lead to mould and strong odours. Atlantic Brick and Stone’s inspection services help catch these problems early, recommending fireplace maintenance or light cleaning every three to four years so the chimney is ready whenever you decide to

How to Waterproof a Concrete Foundation? A hairline crack in a basement wall can seem harmless, right up until the day water squirts through it in a spring thaw. Many homeowners only start asking how to waterproof a concrete foundation after they smell musty odours or see boxes ruined on the floor. By that point, water has already crept through the concrete, and the damage has started. In the Fredericton area, concrete foundations face a tough mix of freeze–thaw cycles, heavy rain, and long periods of snowmelt. Water in the soil presses against basement walls, then freezes, then thaws again. That repeated pressure opens small gaps, lets more water in, and can weaken the structure over time. Left alone, it leads to mould, flaking concrete, and even bowing walls. Waterproofing is not an upgrade for later. For most homes, it is a basic part of protecting structure, indoor air quality, and property value. New builds need proper exterior foundation waterproofing from day one. Older homes often need a repair plan that can include exterior work, interior foundation waterproofing, drainage upgrades, and targeted foundation crack repair. This guide walks through what matters most. It explains the difference between waterproofing and dampproofing, covers the main basement waterproofing methods, shows how professionals install modern systems step by step, and points out when a DIY patch is not enough. With more than 15 years in foundation repair around Fredericton, Atlantic Brick and Stone uses these same methods every day, so by the end of this guide, it will be clear what your foundation needs and what to ask for when you call in help. Waterproofing vs. dampproofing – what your foundation really needs? When people first look into how to waterproof a concrete foundation, they often run into the words waterproofing and dampproofing and assume they are the same. They are not. Each one handles a different problem, and choosing the wrong one can leave a basement wet even after work is done. What is dampproofing? Dampproofing is a thin coating, usually asphalt based, brushed or sprayed onto the outside of a wall. It slows down moisture vapour that moves through soil and concrete. It works reasonably well in dry soil with good natural drainage. What it does not handle is actual water pressure that builds up against the wall after heavy rain or snowmelt. What is waterproofing? Waterproofing is a thicker barrier system that is designed to resist water under pressure. It often uses a self-adhered or liquid membrane, plus drainage components, to stop water from pushing through concrete or block. When water fills the soil around a house, it creates hydrostatic pressure, which is the force that pushes water into every small opening. Proper waterproofing is built to withstand that pressure over many years. In low-risk areas with sandy soil and very shallow basements, dampproofing and good grading may be enough. In Fredericton and nearby communities, with finished basements, clay soils in many neighbourhoods, and long wet seasons, full waterproofing is the safer choice. Positive-side waterproofing, done on the exterior face of the wall, is the current standard for long-term basement moisture prevention. Why exterior waterproofing is the most effective solution When learning how to waterproof a concrete foundation, it helps to picture where the water actually is. The source is outside in the soil, so the most effective defence goes on the outside face of the wall. This is called positive-side waterproofing, because it is applied on the side that sees water pressure. An exterior waterproofing system includes a membrane on the wall and drainage at the footing. Hydrostatic pressure in the soil pushes that membrane firmly against the concrete. Instead of fighting the pressure, the system uses it to keep the barrier tight. The concrete stays dry, reinforcing steel inside the wall stays protected from rust, and freeze–thaw cycles have less effect. Interior methods work on the negative side, after water has already passed through the wall. Interior drains and sump pumps do a good job of collecting and redirecting that water, but the concrete still gets wet. Over many years, that can lead to spalling, crumbling mortar, and damage to finishes such as drywall and flooring. Exterior foundation waterproofing does involve excavation, so it is more involved at the start. The payoff is that it addresses the source of the problem instead of just catching water inside. Atlantic Brick and Stone designs both exterior and interior systems and can recommend the right combination for each property after a diagnostic inspection. Primary methods and materials for concrete foundation waterproofing There is more than one way to waterproof a concrete wall, but modern systems share a few key parts. A membrane blocks water at the wall, protection layers shield that membrane, and drainage components move water away. Knowing these parts helps when comparing quotes or discussing waterproofing membrane installation with a contractor. Sheet-applied waterproofing membranes Sheet-applied membranes are common on poured concrete and block foundations around Fredericton. These products are usually made from rubberized asphalt or modified bitumen, bonded to a plastic film. Installers first apply a primer, then roll the self-adhered sheets onto the wall so they overlap and form a continuous skin. Factory control gives each sheet a consistent thickness, which means reliable performance over the whole wall. These membranes bridge small cracks, stand up to the impact of backfilling, and handle slight movement in the structure. When installed correctly, they help waterproof basement block walls, poured walls, and even short foundation sections under additions. Liquid-applied waterproofing membranes Liquid-applied membranes are sprayed, rolled, or trowelled onto the foundation. After curing, they form a seamless, rubber-like coating that sticks tightly to the wall. Because there are no seams, there are fewer weak spots where water might sneak in. These membranes are especially useful on foundations with lots of corners, curves, or pipe penetrations. The liquid follows every contour and hardens into a smooth, continuous layer. The flexibility of the cured material lets it stretch slightly if hairline cracks form

What Is Repointing Brick? A Homeowner’s Guide You walk around your house one spring and notice hairline cracks and little piles of sandy mortar under your brick wall. The bricks still look fine, but the grey lines between them seem tired and weak. Many homeowners start searching what is repointing brick at this moment, worried about leaks, drafts, or bigger structural issues. Brick can last for generations. The mortar between each unit is different. It behaves like a cushion or gasket, taking more abuse from rain, snow, and temperature swings, and it wears out first. That wear is normal. It simply means the joints need attention through masonry repointing before damage spreads. Repointing renews those tired joints so your walls stay strong, dry, and good‑looking. This matters even more around Fredericton, where freeze‑thaw cycles and heavy snow are hard on unprotected masonry. This guide explains what repointing is, why mortar fails, the signs your home needs brick pointing repair, how the process works, what affects cost, how it compares to tuckpointing, and why skilled work matters. You will also see how Atlantic Brick and Stone, with over 15+ years of local masonry experience, helps homeowners across Fredericton and nearby communities protect and restore their properties. What is repointing brick? When people ask what is repointing brick, they mean a very specific kind of mortar repair. Repointing is the careful removal of damaged mortar from the joints between bricks, followed by packing those joints with fresh mortar that closely matches the original. The work focuses on the exposed outer part of the joint, where weather hits hardest. This is not a quick cosmetic touch‑up. Proper brick repointing is a structural repair. Mortar acts as the glue that ties the wall together and as the first barrier against water. Once it fails, moisture seeps into tiny gaps, freezes, and starts to push bricks apart. Repointing stops that cycle and restores strength. Think of a brick wall as a grid: bricks are the blocks, mortar joints are the lines. Repointing repairs those lines and usually leaves the bricks themselves in place. If bricks are badly damaged, that is a separate task called brick replacement, often done alongside brick joint repair. In a correct brick mortar replacement, the mason removes loose mortar to a set depth, cleans and dampens the joints, then presses in new mortar in thin layers. The mix is chosen to bond well, shed water, and match the wall’s colour and texture. Done properly with the right materials, fresh pointing can last several decades. Atlantic Brick and Stone approaches every repointing project with that long view in mind, using mortar suited to the age and type of brick rather than a one‑mix‑fits‑all approach. That care helps repairs stand up to Fredericton weather for many winters. Why brick mortar deteriorates over time Mortar is meant to be slightly softer than the bricks or stones around it. That way, it absorbs movement and weather, sacrificing itself instead of the bricks cracking. Over time, this sacrificial material breaks down and needs masonry repointing. Major causes include: Weather: Water seeps into hairline cracks, then freezes and expands. Repeated freeze‑thaw cycles slowly force mortar grains apart, just like winter creates potholes. Movement: Foundations settle and framing shifts. Even small building movements can stress mortar joints, especially near corners and openings. Sun and temperature swings: Heat and UV light dry and shrink the surface, then cooler nights make it contract again. That constant cycle weakens already tired joints. Human factors: Mortar mixed poorly, packed too quickly, or chosen in the wrong type for the brick (for example, very hard cement mixes on soft historic bricks) can fail sooner than expected. Repointing is a normal part of brick wall maintenance, not a sign of bad construction. The key is timing: catching worn joints early with brick pointing repair is far cheaper than fixing loose bricks, leaks, or bulging walls later. Signs your home needs brick repointing A slow walk around your home a few times a year is often enough to spot trouble early. Knowing what to look for is just as important as asking what is repointing brickwork. Crumbling or powdery mortar Gently scrape a mortar joint with a key or even your fingernail. If it sands away easily, feels soft, or falls out as powder, it has lost much of its strength. This crumbling brick mortar usually appears first on the most exposed faces and is an early sign that masonry repointing is needed. Visible cracks in mortar joints Thin hairline cracks or wider gaps that run along or across joints give water a direct path into the wall. Stair‑step cracks that zigzag up through the joints, especially near corners or windows, can point to movement or stress in the structure. Any visible cracking in mortar should be taken seriously and investigated. Missing mortar or gaps Sometimes material is not just cracked; it is gone. You might see: Small holes in the joints Recessed seams that look deeper than others Long gaps where you can see farther into the wall These empty mortar joints need repair let more water reach the bricks and the inner structure, weakening the assembly. When gaps are widespread, brick mortar replacement is overdue. Loose or wobbly bricks If a brick can be moved by hand or feels loose when pressed, the surrounding mortar has failed. Loose brick wall problems are a safety concern, especially high on walls or around chimneys, and they place extra stress on nearby joints. At this stage, prompt brick joint repair by a professional mason is important for both safety and stability. Damp patches or interior moisture Mortar failure often shows indoors first. Watch for: Damp spots on interior plaster or drywall Peeling paint near exterior walls Mould in corners or around window heads These can all signal water travelling through worn mortar joints from outside. If interior moisture lines up with exterior brickwork, a closer look and possible exterior brick repair are wise. Bulging, bowing,