Fix Cracks Before They Spread
Foundation Crack repair Services
Serving in Suffolk County, Nassau County, and Town of Freeport


Peace of Mind Starts with a Solid Foundation
Cracks in your foundation are more than cosmetic, they’re signs your home may be under pressure. At Diamond Masonry & Waterproofing, we specialize in foundation crack repairs that stop damage in its tracks while restoring your home’s stability. Book a free estimate today!
Trusted Repairs
We’ve repaired all types of foundation cracks.
Tough Sealants
We use high-performance resins and sealants.
Respectful Crew
Our team is punctual, tidy, and always professional.
Tailored Repairs
Every crack is different, so should be your solution.
Upfront Pricing
Honest pricing right from the start.
Cracks Happen And We Know How to Handle Them
Foundation cracks can show up for many reasons, shifting soil, water pressure, temperature changes, but they all need to be addressed before they grow worse. No matter if you’re seeing hairline cracks, step cracks, or water seepage, we’re here to help.
At Diamond Masonry & Waterproofing , we’ve done hundreds of foundation crack repairs across homes just like yours. We don’t just patch it and leave, we take the time to understand the cause and give you a fix that lasts.
Here’s a breakdown of our repair process:
Take the first step toward a dry, secure home. Contact us now for expert waterproofing and masonry solutions tailored to your needs.
We’ve completed over 500 foundation-related projects with 150+ amazing reviews. Whether you’re dealing with small surface cracks or deeper structural concerns, foundation solutions from us are the reliable fix your home needs.
Yes, foundation cracks can absolutely be repaired, and the sooner, the better. We offer proven solutions that stop cracks from spreading and restore your home’s structural integrity.
The best method depends on the type and severity of the crack. For most homes, we use high-quality epoxy or polyurethane injection to seal and stabilize the area, but we’ll recommend what’s best for your specific situation.
Cracks wider than 1/4 inch, or ones that grow over time, may be a sign of structural issues. If you see stair-step cracks, bowing walls, or water leaking through, it’s time to call in our professionals for an assessment.
It depends on where the water or pressure is coming from. Interior crack repairs are effective for many cases, but in some situations, exterior solutions may be needed for long-term protection, we’ll guide you through what’s right.
The most common and effective method is crack injection, typically with epoxy or polyurethane. It fills the crack completely and bonds to the concrete to prevent further movement or leaks.
In New York, seasonal temperature shifts can cause soil expansion and contraction, putting stress on your foundation. This constant movement, especially during freeze-thaw cycles, can lead to new cracks or make existing ones worse, particularly in older homes or those with poor drainage around the foundation.
Epoxy injection is a strong and long-lasting solution for structural cracks, as it bonds the concrete and restores its integrity. When applied correctly, it can last for many years. However, it’s most effective when the underlying issue, like poor drainage or settlement, is also addressed.
Not all cracks require immediate repair. Hairline or shrinkage cracks that don’t change over time may be harmless, but widening, horizontal, or water-leaking cracks should be evaluated promptly. Monitoring any changes is key to knowing when professional repair is necessary.
Common causes include settling soil, poor drainage, hydrostatic pressure, freeze-thaw cycles, and tree root intrusion. Homes built on clay-heavy soil or with inadequate waterproofing are especially prone to cracking over time. Local weather conditions and age of construction also play a role.
Small surface cracks might be manageable with store-bought sealants, but structural or leaking cracks should always be handled by a professional. Improper repair can mask bigger issues or lead to more serious problems later on. Our trained technicians can diagnose the cause and ensure the fix holds up.