If you're dealing with a stair-step crack running through the block wall that's gotten visibly wider since last year, Arrow Tight Waterproofing's Foundation Crack Repair specialists are ready to diagnose it right and fix it for good β not just patch the symptom.
π Speak With a Specialist
Our technicians carry crack width gauges and moisture meters to document severity and active-versus-dry status at every visit.
An actively weeping crack gets priority scheduling β we know that delay means more water intrusion and potential structural concern.
We quote crack injection as a flat price per crack based on length and access difficulty, given in writing before we mix any resin.
For block walls with bowing or lateral movement, we install carbon fiber reinforcement straps rated for structural load, not a cosmetic surface fix.
We diagnose before we quote, so the Foundation Crack Repair scope you approve is built around your property, not a generic package.
For cracks that are actively leaking, we install surface injection ports at 8 to 12 inch intervals and pump low-viscosity polyurethane resin from the lowest port upward β the foam expands on contact with water and cures flexible, sealing the full depth of the crack.
Because it cures flexible, polyurethane accommodates minor seasonal foundation movement without the seal cracking again. It's a step we won't shortcut, because a poorly sealed crack is worse than an untouched one.
π Get a Free Quote βWhen a crack is dry and the goal is restoring structural bond strength rather than stopping water, we use rigid two-part epoxy injected under pressure through the same port-and-backer method.
Epoxy fully bonds the two crack faces back into one structural unit, which polyurethane's flexible cure doesn't provide. Getting the chemistry and depth right the first time is what makes crack repair actually permanent.
π Get a Free Quote βFor block or poured walls showing horizontal cracking or early inward bowing, we install carbon fiber straps anchored at the floor and rim joist β arresting further lateral movement without the cost of full excavation and replacement.
This is paired with crack injection, not used as a standalone water seal, since its job is structural stabilization. It's a step we won't shortcut, because a poorly sealed crack is worse than an untouched one.
π Get a Free Quote βConcrete block foundations often leak at the mortar joints rather than through the block itself β we grind out deteriorated joints to a minimum 3/4 inch depth and repack with waterproof hydraulic cement.
This addresses the most common water entry point in older block foundations that a surface coating alone can't fix. Getting the chemistry and depth right the first time is what makes crack repair actually permanent.
π Get a Free Quote βAfter injection cures, we pressure-test the repair and monitor through at least one rain event where possible, confirming the seal holds before considering the job complete.
Every crack repair is documented with before/after photos as part of your written warranty file. It's a step we won't shortcut, because a poorly sealed crack is worse than an untouched one.
π Get a Free Quote βCall +1-866-476-1348 and tell us whether the crack is actively leaking, its rough length, and where it's located. That routes the right technician and materials to your job.
Active leaks get priority scheduling across Baltimore; our crews typically arrive within a day or two for urgent cracks and within the week for stable ones.
The technician classifies the crack type, measures width and depth, and quotes a fixed injection price on the spot β no per-foot guessing.
Once approved, we inject the crack, verify the seal, and provide written warranty documentation covering the repaired section.
"Crack in the poured wall had been dry for two years then started weeping after a bad storm. Polyurethane injection sealed it same visit β we've had three heavy rains since with zero seepage.Exactly the fix that crack needed."
"Had a stair-step crack in the block wall that kept getting a little wider every year. They caught it as early bowing and added carbon fiber straps along with the injection β no movement since.Exactly the fix that crack needed."
"Tried patching a crack myself with the caulk-tube stuff from the hardware store. Failed within a season. Their polyurethane injection is a completely different level β held through a full rainy season now.No regrets going with the injection over a patch."
"Mortar joints on our block foundation were the actual leak source, not a crack at all. They repointed the whole section with hydraulic cement instead of just trying to inject something that wouldn't have worked.Held up through every storm since."
Our Foundation Crack Repair coverage spans Baltimore, MD, with the same certified standard applied whether your property is in Baltimore or just outside it.
