Beton en metselwerk Services

Spalling is the flaking, chipping, or peeling of a concrete surface that exposes the rough aggregate underneath and worsens quickly once it starts. It is typically caused by freeze-thaw cycles forcing moisture expansion inside the slab, deicing salts accelerating surface breakdown, or poor finishing during the original pour. A concrete mason grinds away the loose material, applies a bonding agent, resurfaces the area with a polymer-modified overlay, and seals the finished surface to prevent future moisture intrusion.

Concrete steps that are spalling, crumbling, or cracking pose a safety hazard and reduce curb appeal. The damage is usually caused by freeze-thaw cycles, de-icing salts, or poor original concrete mix. A concrete and masonry specialist can resurface, patch, or replace damaged steps depending on the severity.

A driveway that is sinking, developing uneven sections, or pulling away from the garage floor is a sign of soil settlement, poor compaction, or drainage issues underneath. The trip hazards and water pooling can worsen over time. A concrete specialist can lift sunken slabs with mudjacking or polyurethane foam injection, or replace severely damaged sections.

A concrete slab that has sunk or settled unevenly creates trip hazards, pools water against the foundation, and worsens as the void beneath the slab grows. Causes include soil erosion from poor drainage, tree-root decay leaving voids, or inadequate compaction during the original pour. A concrete mason can lift the slab back to grade using polyurethane foam injection or mudjacking, fill the void, and level the joints so the surface is flush, safe, and drains correctly.

Sunken or heaved concrete walkway slabs create trip hazards, collect standing water, and reduce curb appeal. The problem is typically caused by soil erosion, tree root growth, or freeze-thaw cycles that shift the sub-base. A concrete mason can level the slabs through mudjacking or polyurethane foam lifting, or replace severely damaged sections with new concrete or pavers.

The mortar joints between chimney bricks endure the worst conditions in your home — direct sun, driving rain, freeze-thaw cycles, and constant exposure to combustion gases from the inside. Over 20–40 years the mortar erodes, cracks, and eventually crumbles away, leaving gaps between bricks. This process (called spalling or joint deterioration) lets water penetrate the chimney structure, which accelerates the damage: water freezes inside the gaps, expanding them further, and can travel down into the flashing, attic, or even interior walls. Left unrepaired, a deteriorating chimney becomes a structural risk — loose bricks can fall, and water infiltration causes mold and rot. The fix is called tuckpointing (or repointing): a mason grinds out the old mortar to a uniform depth and packs fresh mortar into the joints. Cost is typically $500–$2,500 for a standard residential chimney, depending on height, access, and how many joints need work. A chimney cap ($200–$600 installed) prevents most direct rain and animal entry.

Concrete driveway slabs that lift, tilt, or become uneven are usually caused by frost heave (water in the sub-base freezing and expanding), tree root growth underneath, or poor compaction of the gravel base during original installation. The resulting trip hazards and pooling water worsen every freeze-thaw season. A concrete mason can mudjack (pump a cement slurry under the slab to lift it back to grade) for $500–$1,500 per slab, use polyurethane foam injection ($1,000–$3,000) for a lighter, longer-lasting lift, or remove and re-pour the affected section ($8–$15 per square foot). If root intrusion is the cause, the roots need to be addressed first or the heaving will recur.

Spalling is when the face of a brick flakes, chips, or pops off, exposing the softer interior to further damage. The primary cause is the freeze-thaw cycle: moisture penetrates the brick, freezes, expands, and breaks off the outer layer. Contributing factors include poor-quality or too-soft brick, deteriorated mortar joints that let water in, moisture trapped behind the brick by impermeable coatings or missing weep holes, and efflorescence (white salt deposits) that signals chronic moisture movement. Left unaddressed, spalling spreads from cosmetic surface damage to structural compromise — crumbling bricks weaken the wall section and can allow water into the wall cavity. Repair involves repointing (removing old mortar and pressing in new mortar matched to the original), replacing individual severely damaged bricks, and addressing the moisture source. A mason evaluates whether the damage is cosmetic (surface repoint) or structural (partial wall rebuild), checks flashing and weep holes, and selects mortar that matches the original in strength and composition — using too-hard mortar on old soft brick accelerates damage.

Expansion joints are the flexible seams cut into driveways, sidewalks, and patios that let concrete slabs expand and contract with temperature changes without cracking. When the filler material dries out, crumbles, or pulls away, water seeps into the gap, erodes the sub-base, and accelerates slab movement and cracking. A concrete mason cleans out the old filler, applies a backer rod for proper depth control, fills the joint with a self-leveling polyurethane sealant, and tools the surface flush to restore long-term flexibility.

Scaling is the progressive peeling and flaking of a concrete driveway's top surface, exposing rough aggregate underneath and making the driveway look patchy and deteriorated. It is typically caused by repeated freeze-thaw cycles that trap moisture in the pore structure, excessive use of deicing salts, inadequate air entrainment during the original pour, or premature finishing that sealed bleed water under the surface. A concrete mason removes all loose and delaminated material, applies a bonding slurry, installs a polymer-modified resurfacing overlay, and seals the finished surface to protect against future moisture and salt penetration.

A garage floor that dips or settles where it meets the driveway apron creates a visible lip, a trip hazard, and a gap that lets water, leaves, and pests enter the garage. The apron area is especially vulnerable because it sits on fill soil that compacts over time, receives repeated heavy vehicle loads, and endures more freeze-thaw cycles than the protected interior slab. Once a gap opens, water infiltrates beneath the slab and accelerates erosion of the sub-base, making the settlement progressively worse. A concrete mason can assess whether the slab can be raised through mudjacking or polyurethane foam injection, or whether the section needs to be removed and re-poured on a properly compacted base with adequate reinforcement.

A crack in a concrete garage slab that grows wider over time usually signals that the subgrade beneath the slab is settling unevenly or that freeze-thaw cycles are heaving sections apart. Thin hairline cracks are common in new concrete, but once a crack exceeds 1/4 inch wide or one side is noticeably higher than the other, the slab is shifting structurally. Water infiltration through the widening crack can accelerate erosion of the gravel base below, creating voids that cause further settlement. A concrete mason can assess whether the slab needs crack injection with epoxy or polyurethane, partial slab replacement, or mudjacking to lift settled sections back to grade.

A decorative stamped concrete patio or driveway can develop unsightly white patches, bubbling, or flaking sealer within a few years of installation. This happens when moisture gets trapped beneath an acrylic sealer coat — the water vapor turns the film milky-white (a process called blushing). Applying sealer too thickly, sealing over damp concrete, or recoating before the previous layer fully cured are the usual triggers. Once peeling starts, the old sealer traps dirt in the exposed edges and makes the surface dangerously slippery when wet. A concrete mason can strip the failed sealer with a solvent or chemical stripper, let the slab dry thoroughly, and reapply a breathable sealer at the correct mil thickness to restore the color and protect the stamped pattern for years.

A concrete patio that has sunk creates trip hazards at the step-down from the house, collects standing water against the foundation wall, and can crack along stress lines as the slab tilts. Settling usually happens when the fill soil beneath the slab compacts over time, when downspouts wash soil out from under the edges, or when tree roots decompose and leave voids. A concrete mason can lift the sunken sections using mudjacking or polyurethane slab-jacking, seal the resulting joints, reroute drainage away from the patio, and fill any underlying voids to prevent repeat settling.

A brick mailbox column that leans, cracks, or sheds mortar is both an eyesore and a liability — a strong wind or a car bumper can topple it onto a sidewalk. The root cause is usually frost-heave, a shallow footing, or decades of water seeping into deteriorated mortar joints. A concrete mason can rebuild the footing, re-lay or repoint the brickwork, and install a proper cap to keep water out of the joints long-term.

Concrete patio scaling — where the surface layer peels, flakes, or pits in thin sheets exposing rough aggregate underneath — is a freeze-thaw durability failure that worsens every winter. The damage typically starts as small, shallow pop-outs or rough patches and progresses to large sections of missing surface over two to three seasons. The primary cause is water penetrating the top quarter-inch of concrete, freezing, expanding by roughly 9%, and physically breaking the surface layer away from the denser concrete below. Three conditions accelerate scaling: inadequate air entrainment in the original mix (the concrete lacks the microscopic air bubbles that give ice room to expand), premature finishing (troweling the surface while bleed water is still present seals a weak, high-water-ratio layer at the top), and deicing salt application during the first winter (sodium chloride and especially calcium chloride increase the number of freeze-thaw cycles the surface experiences and chemically weaken young concrete). Once scaling has started, no sealer or coating will reverse the damage — the delaminated surface must be removed. A concrete mason can assess the depth of damage and recommend either a bonded overlay (a thin cementitious or polymer-modified layer applied over mechanically prepared existing concrete) for shallow scaling under half an inch, or full removal and replacement for deep or widespread damage. Preventing future scaling requires specifying 6–7% air-entrained concrete with a maximum water-cement ratio of 0.45 and avoiding salt for the first winter.