Crack Repair with CrackShield™

We seal cracks with polyurethane pressure injection. Then we restore the surface. Backed by a 25-year warranty.

Engineer-Founded · Since 2005

25-Year Warranty

No Subcontractors — Ever

All Wall Types

A Crack Is a Symptom. We Fix the Cause Too.

Crack repair is rarely the whole job. A foundation crack is usually a symptom — of soil movement, hydrostatic pressure, poor drainage, or seasonal foundation stress. Repair the crack without addressing the cause, and a new crack often shows up within a year.

At DMV Waterproofing, every CrackShield™ inspection starts with the cause. We look at why the crack formed. If drainage is the root issue, we recommend FootingShield™ or exterior solutions. If foundation movement is active, we recommend stabilization. Only then do we repair the crack — using the right method for your wall type.

We tell you what's needed. We don't oversell, and we don't undersell.

CrackShield™ — How We Repair Cracks Right

The right crack repair method depends on what your foundation wall is made of. We use three different approaches — one for each wall type. The wall type tells us what to do.

Concrete Walls — Polyurethane Pressure Injection

Poured concrete foundation walls are repaired using polyurethane pressure injection — the gold standard for sealing cracks against water. Polyurethane is flexible, expands when it contacts moisture, and penetrates the full thickness of the wall. Our six-step process:

1. Drill packer holes every 15 cm along the crack. Holes are spaced precisely so the injection grout can travel through the full length of the crack without gaps.

2. Install mechanical packers. Steel packers are seated into each hole and tightened. They create a pressure seal that lets us pump grout under controlled force.

3. Pressure-inject polyurethane grout. Polyurethane is pumped through the packers under the right PSI for the wall. The grout travels through the crack and exits the back side — confirming a full-thickness seal.

4. Wait 24 hours for cure and expansion. Polyurethane expands when it contacts moisture, filling every void in the crack. Full cure takes 24 hours.

5. Cut packers flush and clean the surface. Packers are cut at the wall face. Excess grout is trimmed. The surface is cleaned and prepped for restoration.

6. Patch with polymer-modified cementitious mortar. The wall surface is restored with a polymer-modified waterproofing mortar — engineered to bond to existing concrete and resist moisture indefinitely.

CMU Walls — Block Replacement & Mortar Repointing

Concrete masonry unit (CMU) walls — the hollow concrete block walls common in older DMV homes — can't be pressure-injected because the grout spreads into the empty block cores instead of forming a seal. Instead, we replace damaged blocks and repoint failed mortar joints. Once the wall is structurally sound again, we address the cause of the cracking — typically water management or foundation drainage — so the new repair lasts.

Brick Walls — Brick Replacement & Mortar Repointing

Brick foundation walls are repaired by replacing damaged bricks and repointing the surrounding mortar joints. As with CMU, the mortar joints can't hold a pressure injection, so the right approach is restoration rather than injection. And as with every CrackShield™ repair, we identify and address the underlying cause — drainage, settlement, or moisture — so the crack doesn't return.

Why Polyurethane Pressure Injection for Crack Repair?

Polyurethane crack repair is recognized by the American Concrete Institute as a standard waterproofing method for sealing flexible cracks in poured concrete walls. Unlike rigid alternatives, polyurethane accommodates seasonal foundation movement and expands when it contacts moisture — sealing the full thickness of the wall.

For homeowners researching crack repair options, the U.S. Department of Energy's Building America Solution Center outlines why polyurethane is preferred for waterproofing concrete foundation cracks.

foundation crack repair with CrackShield polyurethane pressure injection DMV Waterproofing

Backed by a 25-Year Warranty

Every CrackShield™ crack repair is covered by our 25-year warranty. That confidence comes from the materials, the method, and the diagnosis. We don't repair cracks without addressing the cause — which is why our repairs last.

Our warranty covers the repair work itself and water entry through the repaired crack location, subject to standard conditions. New cracks caused by foundation movement, soil settlement, or external forces are not covered — but in many cases, those issues call for a different solution we offer (foundation repair, FootingShield™ drainage, or wall stabilization), which we'll diagnose and recommend if found.

Frequently Asked Questions

How long does crack repair take? A typical residential crack repair takes 2 to 4 hours of on-site work, plus a 24-hour cure window for concrete wall injections before we return to finish the surface. CMU and brick wall repairs may take longer depending on the extent of damage.

Will the repair be visible after you're done? Concrete wall repairs are restored with polymer-modified mortar that closely matches the wall texture. CMU and brick repairs are visible where replacement was needed, but blend with the surrounding wall once the mortar cures. We don't promise a paint-ready finish — that's the homeowner's call.

Can I repair a crack myself with a DIY kit? DIY kits use surface-applied epoxy or polyurethane. They seal the inside face of the wall but don't penetrate the full thickness. Most fail within 1 to 2 years when hydrostatic pressure pushes water back through. Pressure injection through mechanical packers — and proper repointing for masonry walls — is the only way to make a repair that lasts.

Do you always inspect the cause of the crack? Yes. Every CrackShield™ inspection starts with the cause. If drainage, foundation movement, or water pressure is the root issue, we tell you — and recommend the right solution before we repair the crack.

Do you combine crack repair with other waterproofing services? Often, yes. If we install FootingShield™ in your basement and you have active wall cracks, CrackShield™ repair is typically performed as part of the same project. We combine services when it makes sense — and we never charge for work that isn't needed.

Schedule a Free Inspection

We'll diagnose your foundation crack — and the cause behind it — and recommend the right repair for your wall type.

Get My Free Inspection