Foundation Crack Repair in Lawrence, NY

Stop Foundation Water Leaks for Good

Professional crack injection and structural repairs that actually work the first time.

Hear About Us

Lawrence Foundation Repair Contractors

Your Basement Stays Dry Year-Round

You know that sinking feeling when you walk downstairs after a heavy rain and see water seeping through your foundation walls. Those cracks aren’t just cosmetic problems – they’re your home telling you it needs help.

When foundation cracks are properly repaired, your basement becomes the space it should be. No more musty smells, no more scrambling to move storage boxes away from wet spots, no more wondering if that crack is getting bigger every time you look at it.

The right foundation crack repair gives you a basement you can actually use. Whether that’s for storage, a workshop, or finished living space, you get peace of mind knowing water stays outside where it belongs.

Diamond Masonry Lawrence NY

We Fix What Others Can't

We’ve been handling foundation repairs throughout Nassau County for years. We’re not general contractors trying to do everything – we specialize in masonry and waterproofing because that’s what foundation problems actually require.

Most foundation issues in Lawrence come down to water management and structural integrity. The clay soil here expands and contracts with the seasons, putting pressure on foundation walls that weren’t built to handle it. We understand how Nassau County foundations fail and what it takes to fix them permanently.

You’re dealing with licensed professionals who show up when we say we will and explain exactly what’s wrong before we start any work.

Foundation Crack Injection Process

Here's Exactly What We Do

First, we inspect every crack to determine whether you’re dealing with settling, structural movement, or simple water infiltration. Not all cracks are the same, and the repair method depends on what’s actually causing the problem.

For most foundation cracks, we use professional-grade polyurethane or epoxy injection. We drill precise injection ports along the crack, then pump the repair material under pressure until it completely fills the void. This creates a waterproof seal that’s actually stronger than the surrounding concrete.

Structural cracks get different treatment. We may need to install carbon fiber reinforcement or steel brackets before sealing, depending on what’s causing the movement. You’ll know exactly what we’re doing and why before we start, and you’ll see the difference immediately when the work is done.

Ready to get started?

Explore More Services

About Diamond Masonry & Waterproofing

Get a Free Consultation

Basement Wall Crack Repair

What's Included in Every Repair

Every foundation crack repair starts with a thorough inspection of your entire basement. We’re looking for patterns that tell us whether you have isolated cracks or a bigger structural issue that needs addressing.

You get detailed photos and explanations of what we find, including cracks you might not have noticed yet. We handle everything from hairline settling cracks to major structural repairs, and we’ll tell you honestly which category your situation falls into.

All crack injection work comes with warranty coverage because we use commercial-grade materials designed for permanent repairs. We also handle any necessary permits and make sure the work meets Nassau County building codes. You get a basement that stays dry and a repair that actually lasts.

How do I know if my foundation crack is serious?

Horizontal cracks, cracks wider than a quarter-inch, or cracks that are actively growing usually indicate structural issues that need immediate attention. Vertical cracks from settling are typically less urgent but still need proper sealing to prevent water damage. The key is having someone who understands foundation movement look at the crack pattern in your entire basement, not just individual cracks. We can usually tell you over the phone whether you’re dealing with an emergency or something that can wait a few weeks for proper scheduling.

Will crack injection actually stop water from coming through my foundation?

Professional crack injection creates a permanent waterproof seal when done correctly. The polyurethane we inject expands as it cures, completely filling the crack and bonding to the concrete. However, injection only works if the crack isn’t actively moving due to structural problems. That’s why proper diagnosis matters – we need to stop any structural movement first, then seal the crack. DIY crack fillers from hardware stores typically fail because they don’t penetrate deep enough and aren’t designed for below-grade water pressure.

How long does foundation crack repair take?

Most crack injection repairs take 2-4 hours depending on the number and size of cracks we’re sealing. The injection material cures quickly, so your basement is ready to use the same day. Structural repairs that require reinforcement take longer – usually a full day for carbon fiber installation or steel bracket work. We’ll give you an accurate timeline after inspecting your specific situation. Weather doesn’t affect the work since we’re working inside, so scheduling is usually flexible.

What's the difference between epoxy and polyurethane injection?

Epoxy injection is best for structural cracks where you need maximum strength to prevent further movement. It essentially welds the crack back together and is ideal for load-bearing repairs. Polyurethane injection is better for active water leaks because it expands as it cures and remains slightly flexible, accommodating minor seasonal movement. Most basement wall cracks get polyurethane because stopping water infiltration is the primary goal. We choose the right material based on whether your crack is moving and whether water is actively coming through.

How much does foundation crack repair cost in Lawrence?

Simple crack injection typically runs $300-600 per crack depending on length and accessibility. Structural repairs with reinforcement cost more because they require additional materials and labor. The total depends on how many cracks need attention and whether we’re dealing with settling or active structural movement. We provide written estimates after inspection so you know exactly what you’re paying for. Most homeowners find that proper repair costs much less than dealing with ongoing water damage or major structural problems later.

Do foundation crack repairs come with any warranty?

Yes, our crack injection work comes with warranty coverage against water infiltration. The specific terms depend on the type of repair and your foundation’s condition, but we stand behind our work. Structural repairs get longer warranty periods because they’re designed to permanently solve movement issues. We use commercial-grade materials specifically because they’re designed for long-term performance. If a properly injected crack starts leaking again due to our workmanship, we’ll fix it at no charge.

Local Resources