Foundation Crack Repair & Injection in Mississauga
Mississauga's heavy clay soils and 4-foot frost depth put constant lateral and seasonal pressure on poured-concrete foundations, which is why foundation crack injection in Mississauga is one of the most-requested repairs Dryshield handles across Erin Mills, Streetsville, Cooksville, Lakeview, and Port Credit homes. We use two injection methods depending on what the crack is doing.
Polyurethane Crack Injection in Mississauga
Polyurethane resin is the right call for active leaking cracks — vertical poured-concrete cracks that are weeping or actively letting water through during Mississauga's spring thaw and heavy rain events. The resin expands as it cures, fills the entire depth of the crack, and stays flexible through freeze-thaw cycles so the seal won't break the next time the foundation moves. Typical Mississauga polyurethane crack injection job: $650–$1,000 per crack, completed in under three hours.
Epoxy Crack Injection in Mississauga
Epoxy is a structural repair — it bonds the two sides of the crack back together with a tensile strength stronger than the concrete itself. We use epoxy when a Mississauga foundation crack is dry but the wall integrity is at risk: cracks wider than 1/8 inch, cracks with horizontal displacement, or cracks running near corner stress points. Typical cost: $650–$1,000 per crack.
Concrete Crack Repair Methods We Use
Beyond resin injection, Dryshield's Mississauga crew handles concrete crack repair with surface sealants, carbon-fibre reinforcement straps for bowing walls, hydraulic cement for cold joints, and exterior membrane patching where excavation is possible. The right method depends on the wall type (poured concrete vs. block), crack pattern, and whether the crack is dry, weeping, or under structural load.
Hairline, Vertical, Horizontal & Structural Cracks
Mississauga foundations crack in patterns specific to clay soil and frost movement: hairline cracks (shrinkage, usually cosmetic), vertical cracks (settling, usually injection-fixable), horizontal cracks (lateral clay pressure — structural concern, often needs epoxy + reinforcement), and step cracks in block foundations (common in 1960s–70s Lakeview and Cooksville homes — often needs exterior membrane).