Types of Foundation Cracks in Montgomery Homes
Hairline shrinkage cracks in poured concrete walls are common and typically non-structural, though they can allow water seepage. Diagonal cracks running at 45-degree angles from corners of openings indicate differential settlement — the foundation is moving unevenly. Horizontal cracks in block or poured walls are the most serious — they indicate lateral soil pressure is overwhelming the wall's structural capacity. Vertical cracks wider than 1/4 inch usually require repair. We measure, photograph, and classify every crack as part of the inspection.
Crack Repair Methods We Use
Epoxy injection is used for structural cracks where the two faces of the crack must be bonded together. A two-part epoxy is injected under low pressure, filling the crack from the bottom up and restoring structural continuity. Polyurethane foam injection is used for cracks that are actively leaking — the foam expands to fill the crack and creates a waterproof seal, but does not bond the wall structurally. Carbon fiber straps or wall anchors are added when a crack indicates ongoing wall movement that must be stopped.
When Is a Crack an Emergency?
Horizontal cracks, or any crack accompanied by inward deflection of the wall, are structural emergencies requiring prompt professional evaluation. Stair-step cracks in block walls that are widening or showing displacement are also serious. Cracks that are growing — where new crack extensions appear over time — indicate active movement. If you are unsure, call us for an inspection; we will tell you honestly whether the crack requires immediate action or monitoring.
Wall Crack Repair Cost in Montgomery
Epoxy injection repair for a single non-structural vertical crack runs $500–$1,000. Polyurethane injection for an actively leaking crack runs $400–$800. Carbon fiber strap installation for a bowing or cracked wall runs $300–$500 per strap, with most walls requiring 3–6 straps. Full structural repair for severely damaged walls runs $3,000–$8,000 or more depending on extent.