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No pressure. No obligation. Just honest answers from Long Island's trusted experts.

516-920-2543

Call or Text Anytime

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Address

1378 Whittier Ave
Merrick, NY 11566

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Hours

Monday–Sunday: 8AM–8PM
Emergency Service: 24/7

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Service Area

Suffolk County, NY
Nassau County, NY
Town of Freeport, NY

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Licenses

Suffolk County: #HI67081
Freeport: #19283
Fully Licensed & Insured

🚨 EMERGENCY?

📞 516-920-2543

Available 24 hours, 7 days a week.
We respond fast when it matters most.

✓ Family-owned since 2000

✓ 25+ years experience on Long Island

✓ Free estimates — no obligation

✓ Work guaranteed

✓ No corners cut — ever

Request Your Free Estimate

Fill out the form and Christopher will contact you within 1 business hour during business hours (Mon–Sun, 8AM–8PM).

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I agree to be contacted by Diamond Masonry & Waterproofing regarding my estimate request. I understand this is a free, no-obligation estimate and I can ask for pricing details before any work is scheduled.

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516-920-2543 — Mon-Sun 8AM-8PM

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Thank you! Christopher will contact you within 1 business hour during business hours.
Need to reach him sooner? Call 516-920-2543

BASEMENT FLOODING RIGHT NOW?

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Quick Answers

Common Questions

Do you offer free estimates?

Yes — always. Call 516-920-2543 or fill out the form. No pressure, no obligation.

How long does the work take?

Most waterproofing jobs take 2–4 days. We'll give you a specific timeline before any work begins.

Are you licensed and insured?

Yes. Fully licensed: Suffolk County #HI67081, Freeport #19283. Fully insured for your peace of mind.

Is the work guaranteed?

Yes. We stand behind everything we do. Call for specific warranty details on your project.

Do you handle emergencies?

Yes — 24/7 emergency service. Call 516-920-2543 any time, day or night.

Do you do commercial work?

Yes — we serve both residential and commercial customers throughout Long Island.