Foundation Crack Repair in Cedarhurst, NY

Stop Foundation Cracks Before They Get Worse

Permanent crack injection solutions that protect your home’s structural integrity and prevent costly water damage.

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Professional Foundation Repair Contractors

Your Foundation Problems Actually Get Fixed

You’re not looking for another band-aid solution. You want foundation crack repair that actually works the first time.

When we inject cracks with polyurethane or epoxy, we’re creating a seal that’s stronger than the surrounding concrete. That means no more water seeping through basement walls during heavy rains. No more wondering if that crack is getting bigger every time you walk downstairs.

Your basement stays dry. Your foundation stays stable. And you stop losing sleep over whether you’re dealing with a minor issue or a major structural problem.

Cedarhurst Foundation Crack Specialists

We Only Fix What's Actually Broken

Diamond Masonry & Waterproofing LLC has been handling foundation repairs throughout Nassau County for years. We’re the contractors other homeowners call when they’re tired of getting oversold by companies pushing full basement renovations for simple crack problems.

We specialize in masonry and waterproofing work. Not general contracting, not kitchen remodels – just foundations and the problems that come with them. That focus means we know the difference between cracks that need immediate attention and ones that just need monitoring.

Foundation Crack Injection Process

Here's Exactly What We Do

First, we inspect your foundation to determine what type of crack we’re dealing with. Settling cracks get different treatment than active leaks, and we’re not going to waste your time or money treating them the same way.

For structural cracks, we use epoxy injection to restore the concrete’s strength. For water infiltration, we inject expanding polyurethane that creates a flexible, waterproof seal. Both materials cure stronger than the original concrete.

The injection process takes a few hours, not days. We drill small ports along the crack, inject the material under pressure, and remove the ports once everything’s cured. Your foundation is stronger than before, and you can use your basement the same day.

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Basement Wall Crack Repair Services

What's Included in Every Foundation Repair

Every foundation crack repair starts with a thorough assessment of your basement walls and foundation structure. We identify whether you’re dealing with settling, water pressure, or structural movement – because the solution depends on the cause.

You get crack injection using commercial-grade materials that meet or exceed industry standards. We don’t use hardware store products or temporary sealants. The polyurethane and epoxy we inject will outlast the surrounding concrete.

All work comes with a warranty because we stand behind permanent repairs. We also provide you with maintenance recommendations to prevent future foundation problems, including drainage improvements and grading adjustments when needed.

How do I know if my foundation cracks need immediate repair?

Active water leaks and cracks wider than a quarter-inch need immediate attention. If you can see daylight through a crack, or if water comes through during rain, don’t wait. Horizontal cracks are more serious than vertical ones because they indicate structural pressure. Cracks that are growing – you can tell by marking the ends with a pencil and checking monthly – also need professional evaluation. Most settling cracks in Cedarhurst homes are normal and just need sealing, but it takes experience to tell the difference between normal settling and structural problems.

What's the difference between epoxy and polyurethane crack injection?

Epoxy injection is for structural repairs where you need to restore the concrete’s original strength. It’s rigid when cured and essentially welds the crack back together. Polyurethane is for waterproofing – it expands as it cures and creates a flexible seal that moves with normal foundation movement. For cracks that leak water, we typically use polyurethane because it handles the expansion and contraction that happens with temperature changes. For cracks that compromise structural integrity, epoxy is the right choice. Sometimes we use both materials on the same job.

How long does foundation crack repair take and will it disrupt my home?

Most crack injection jobs take 2-4 hours depending on the number and length of cracks. The actual injection process is quiet – no jackhammering or heavy equipment. You’ll hear drilling when we install injection ports, but that’s maybe 15 minutes total. The materials cure within hours, so your basement is usable the same day. We protect your belongings with plastic sheeting, and cleanup is part of the job. The biggest disruption is usually just having contractors in your basement for half a day.

Will crack injection work on my old foundation, or do I need replacement?

Crack injection works on foundations from the 1920s to today, as long as the concrete itself isn’t crumbling. Many Cedarhurst homes built in the 1950s and 1960s have solid concrete foundations that just need crack sealing. We only recommend foundation replacement when the concrete is deteriorating beyond repair, which is rare. Age alone doesn’t disqualify your foundation from injection repair. The key factors are whether the concrete is structurally sound and whether the cracks are from normal settling versus ongoing structural movement.

What warranty do you provide on foundation crack repairs?

We warranty crack injection work against leaks and structural failure. The specific warranty period depends on the materials used and the type of repair, but it’s typically several years for structural epoxy work and waterproofing repairs. The warranty covers our workmanship and the performance of the injection materials. It doesn’t cover new cracks that might develop elsewhere in your foundation, but the cracks we repair should stay sealed. We also provide maintenance recommendations to help prevent future foundation problems that could void warranty coverage.

How much does foundation crack repair cost in Cedarhurst?

Foundation crack repair costs depend on the number of cracks, their length, and whether you need structural repair or just waterproofing. Simple crack sealing typically costs less than major structural injection work. We provide upfront pricing after inspecting your foundation – no surprises or change orders. Most homeowners find crack injection much more affordable than the foundation replacement that some contractors recommend. We’re not the cheapest option, but we use commercial-grade materials and provide warranty coverage that makes the investment worthwhile for long-term peace of mind.

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