Foundation analysis and repair design
Permanent structural crack bonding
Bowing wall stabilization systems
Written coverage on all repair work
Not every crack you find in your foundation wall signals a structural problem, but every crack deserves a professional evaluation because the consequences of misclassifying a structural crack as cosmetic are serious. Our assessment process includes measuring crack width at multiple points, documenting the orientation precisely, checking for horizontal displacement at the crack face, and reviewing the soil and drainage conditions outside the wall. The result is a categorization of the crack as cosmetic, water-entry, or structural -- each with a different repair recommendation.
Horizontal foundation cracks are the category that demands the most urgent attention. A horizontal crack in a concrete block or poured wall indicates that the wall is being pushed inward by lateral earth pressure -- the weight of saturated soil and the force of frost heave pressing against the foundation from outside. Unlike vertical shrinkage cracks, horizontal cracks indicate that the wall is actively deflecting and will continue to do so unless the lateral force is counteracted. Walls that deflect more than one inch from plumb are approaching the threshold at which conventional repair methods may no longer be adequate and more extensive structural remediation may be required. Carbon fiber reinforcement applied to a horizontally cracked wall at the right stage of deflection stops further movement and allows the wall to carry its design loads without progressing to failure.
Polyurethane injection is specified for cracks where flexibility is a design requirement rather than structural re-bonding. Polyurethane foam expands as it cures to fill irregular voids completely, including cracks that are not perfectly planar. The cured foam remains flexible, allowing the wall to undergo minor seasonal movement without reopening the seal -- a characteristic that makes polyurethane the right choice for active cracks where temperature-driven concrete expansion and contraction may continue. Polyurethane injection is also used in wet crack conditions because the foam reacts with water during its cure, making moisture in the crack an asset rather than an obstacle to the seal.
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.
Expanding polyurethane resin fills irregular crack voids completely, including geometry that epoxy cannot fully penetrate, and cures to a flexible seal that tolerates minor seasonal wall movement without reopening.
We calculate strap spacing and quantity based on the measured deflection, wall height, and soil pressure conditions at each job so the reinforcement is engineered for your specific wall rather than generically applied.
Where bowing wall deflection exceeds the threshold for carbon fiber repair alone, a wall anchor system provides mechanical resistance by connecting the deflecting wall to stable soil beyond the active failure zone through a tension rod and plate assembly.
Stair-step cracking in block or brick foundation walls follows the mortar joints and indicates differential settlement, thermal expansion cycling, or deteriorated mortar that has lost its bonding strength over decades.
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.
Written scope defines every material, method, and warranty term before you approve any work so there are no surprises on the invoice.
Carbon fiber installations include verification of bond strength and strap spacing against the engineered design before the job is signed off.
A written warranty is issued on project completion, covering the repair against reoccurrence under normal conditions for the warranty period stated in your contract.
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.
JCB Waterproofing and Construction serves Charlotte homeowners with certified epoxy injection, polyurethane sealing, and carbon fiber reinforcement. Call for your free structural assessment today.
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