Foundation Crack Repair in Jericho, NY

Stop Foundation Cracks Before They Spread

Professional crack injection and structural repairs that actually last, backed by local expertise you can trust.

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Professional Foundation Repair Contractors

Your Foundation Problems Actually Get Fixed

You get a foundation that stops leaking, stops cracking, and stops keeping you awake at night. No more buckets in the basement during storms. No more staring at that crack wondering if it’s getting bigger.

The repair work we do addresses what’s causing the problem, not just what you can see on the surface. That means you’re not calling someone else in six months to fix the same issue again.

Your basement stays dry. Your foundation stays stable. You get back to worrying about things that actually matter instead of whether your house is slowly falling apart underneath you.

Jericho Foundation Repair Specialists

We Know Long Island Foundations

Diamond Masonry & Waterproofing LLC has been fixing foundation problems across Long Island for years. We understand how the clay soil here shifts with the seasons and what that does to your foundation over time.

We’re licensed, insured, and we show up when we say we will. No disappearing acts after you hand over a deposit. No high-pressure sales pitches about problems that don’t exist.

You get straight answers about what needs to be fixed, what doesn’t, and exactly what it’s going to cost before any work begins.

Foundation Crack Injection Process

Here's Exactly What We Do

First, we inspect your foundation to understand what’s causing the cracks. Sometimes it’s settling, sometimes it’s water pressure, sometimes it’s both. We need to know the cause to fix it right.

Next, we clean and prepare the crack properly. This isn’t a caulk-and-pray situation. We use professional crack injection equipment to fill the entire crack with structural-grade polyurethane or epoxy that bonds permanently with your concrete.

After the injection cures, we test the repair and clean up the work area. You get a foundation that’s actually stronger at the repair point than it was originally, plus we explain what to watch for to prevent future problems.

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Basement Wall Crack Repair

What's Included in Every Foundation Repair

Every job starts with a thorough foundation inspection, not just the crack you called about. We check for other developing issues that could cause problems later and give you a complete picture of your foundation’s condition.

The actual repair uses professional-grade materials designed for Long Island’s climate conditions. We’re not using hardware store products that work fine for six months then fail when you need them most.

You also get a detailed explanation of what we found, what we fixed, and maintenance recommendations to keep your foundation in good shape. Plus warranty coverage on our work so you know the repair is going to hold up over time.

How do I know if my foundation crack needs professional repair?

Any crack wider than a quarter-inch, cracks that are actively leaking water, or cracks that have grown since you first noticed them need professional attention. Horizontal cracks are more serious than vertical ones because they usually indicate structural pressure. If you can stick a coin into the crack or see daylight through it, don’t wait. Even smaller cracks should be evaluated if they’re in basement walls below grade, because water infiltration can cause much bigger problems over time.

What's the difference between crack injection and just sealing the surface?

Surface sealing is like putting a band-aid over a deep cut – it might look better temporarily, but it doesn’t actually fix anything. Crack injection fills the entire crack from the inside out with structural material that bonds permanently with your concrete. The repair becomes part of the foundation instead of just sitting on top of it. Surface sealants fail when water pressure builds up behind them or when the foundation moves with seasonal temperature changes. Professional injection creates a repair that’s often stronger than the original concrete.

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

Most crack injection repairs take 2-4 hours depending on the number and size of cracks. The actual injection process is relatively quick, but proper preparation and curing time are important for a lasting repair. You’ll need to avoid putting water pressure on the repair area for 24-48 hours, which means no running the washing machine or taking long showers if the repair is near plumbing. There’s minimal noise and dust compared to major construction work, and you can use your basement normally once the material cures.

Will the crack come back after it's repaired with injection?

A properly done crack injection repair won’t fail at the same location because the injected material is stronger and more flexible than concrete. However, new cracks can develop in other areas if the underlying cause isn’t addressed. That’s why we evaluate your entire foundation, not just the visible crack. If your foundation is still settling or if drainage issues are creating hydrostatic pressure, those problems need to be fixed too. We’ll tell you if there are other issues that could cause future cracking and give you options for addressing them.

How much does professional foundation crack repair cost in Jericho?

Foundation crack injection typically costs between $300-800 per crack depending on length, location, and complexity. Basement wall cracks are usually less expensive than exterior foundation repairs because they’re easier to access. The cost of proper repair is almost always less than dealing with water damage, mold remediation, or structural problems that develop when cracks are ignored. We provide written estimates that break down exactly what work is included so you know what you’re paying for before we start.

Should I get multiple estimates for foundation crack repair?

Yes, especially for expensive repairs or if someone is telling you that you need extensive foundation work. However, be careful about choosing based on price alone. The lowest bid often means corners will be cut on materials or preparation work. Ask each contractor to explain what’s causing the crack, what materials they’ll use, and what warranty they provide. A good contractor will take time to educate you about your foundation’s condition rather than just giving you a number. If someone won’t explain their process or pressures you to sign immediately, keep looking.

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