Foundation analysis and repair design
Permanent structural crack bonding
Bowing wall stabilization systems
Written coverage on all repair work
Foundation cracks are not all equal -- their orientation, width, location, and rate of growth determine whether they represent a minor sealing concern or a structural emergency requiring immediate engineering intervention. Vertical cracks in poured concrete walls most commonly result from concrete shrinkage as the wall cures or from differential settlement as the soil beneath the footing compresses unevenly. These cracks are typically stable after they form and respond well to polyurethane or epoxy injection. Diagonal cracks that radiate from corners of window and door openings also frequently reflect normal settlement but should be monitored for width increase over time.
The repair method matched to horizontal cracks depends on the degree of deflection and the construction type of the wall. For poured concrete walls with deflection below critical thresholds, a carbon fiber strap system bonded to the wall face with structural epoxy provides a tensile reinforcement layer that counteracts the lateral earth pressure. For block walls, carbon fiber straps bonded to a plate assembly anchored into the slab and rim joist provide the same function. In both cases the straps are virtually invisible after installation and do not require interior space to accommodate them.
Epoxy injection and polyurethane injection are the two primary methods for sealing and structurally repairing cracks in poured concrete walls. Epoxy injection produces a bond that is actually stronger than the surrounding concrete, making it the correct choice for cracks where structural re-bonding of the two faces is the goal. The process involves drilling a series of small ports along the crack at intervals calculated to ensure complete penetration, installing surface-mounted injection ports, sealing the visible crack face between ports with epoxy paste, and pumping two-component structural epoxy resin under low pressure until it fully fills the void and appears at adjacent ports. The resin cures within the crack to a solid, high-strength bond that is permanent and fully water-resistant.
Soil settlement beneath footings is an independent cause of foundation cracks that requires evaluation separately from the wall repair itself. When soil compresses or washes out from beneath a footing, that section of the foundation wall loses its support and the wall may develop diagonal cracks as the unsupported section deflects downward. In these cases, crack injection addresses the symptom while leaving the root cause unresolved. Our assessment includes a review of grading, drainage, and visible footing conditions to identify signs that settlement is active. Where settlement is a factor, we coordinate the repair approach to address both the crack and the soil condition that created it, preventing recurrence after the crack is sealed.
From hairline seepage cracks to structural horizontal cracking, we have the right fix.
Every epoxy injection job is documented with before-and-after photos and a report of injection pressures and resin volumes consumed to verify full crack penetration.
We specify the appropriate polyurethane viscosity for each crack condition, using slower-reacting formulations for complete penetration into deep, narrow cracks and faster-reacting types for active water flow.
Carbon fiber straps bonded to the interior face of a bowing or horizontally cracked wall provide a permanent tensile reinforcement layer that counteracts lateral earth pressure and stops further wall deflection in its current position.
Wall anchors can be tightened over time as the soil condition allows, potentially restoring some of the original wall plumb position without excavation or more invasive structural work.
We repair stair-step cracks by tuck-pointing the affected mortar joints with a compatible mortar mix matched to the existing wall, reinforcing corner crack locations, and applying a crystalline waterproofer to the repaired area to prevent water intrusion at the newly bonded joints.
We seal the floor-wall joint with a combination of hydraulic cement at active leak points and a flexible polyurethane sealant bead over the sealed joint to accommodate minor movement without allowing the seal to crack again.
We measure every crack for width, orientation, and displacement, review the soil and drainage context, and classify each crack by type and severity before recommending any repair method.
We match the repair method to the specific crack condition -- epoxy for structural re-bonding, polyurethane for active water and flexible seal requirements, carbon fiber for bowing walls.
Carbon fiber installations include verification of bond strength and strap spacing against the engineered design before the job is signed off.
Your warranty packet includes installation photos, crack condition documentation, and recommended monitoring intervals for any cracks assessed as stable but worth tracking.
We had a 14-foot horizontal crack in our block wall that two other companies dismissed as not serious. JCB Waterproofing and Construction came in, took actual measurements, and explained exactly why it needed carbon fiber straps immediately. The repair looks clean and the wall has not moved since.
I was told by two contractors that my diagonal cracks were just cosmetic. JCB Waterproofing and Construction measured the crack width at three points and showed me they were widening. The epoxy injection repair was completed cleanly and the cracks have been stable for over a year.
I appreciated that they did not try to upsell me on a full drain system when crack injection was the right fix for my situation. They solved the actual problem and the repair has held completely.
Our certified specialists have seen every type of foundation crack in TN -- we know exactly what it takes to fix yours properly.
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