Basement Waterproofing in Seaford, NY
Dry Basements That Stay Dry
Professional waterproofing solutions that protect your Seaford home from water damage, mold, and structural issues permanently.

Hear About Us

Waterproofing Services Seaford NY
Your basement becomes the space you always wanted it to be. No more rushing downstairs during storms to check for water. No more musty smells creeping upstairs. No more worrying about mold or what that dampness is doing to your foundation.
You get peace of mind during Long Island’s heaviest rainfall. Your basement stays dry, your air stays clean, and your home’s value stays protected. The space becomes usable again – whether that’s storage, a workshop, or an extra room for the family.
When waterproofing is done right, you stop thinking about your basement as a problem. It just works, year after year, storm after storm.
Basement Waterproofing Company Seaford
We at Diamond Masonry & Waterproofing LLC have been solving basement water problems for Seaford and Nassau County homeowners who need solutions that actually work. We understand Long Island’s unique challenges – the soil conditions, the coastal moisture, the way water moves around foundations here.
We’re not the guys who show up, spray some sealant, and hope for the best. We’re masonry and waterproofing specialists who diagnose the real problem and fix it properly the first time.
When you call us, you’re working with contractors who live and work in your community. We know what works in Seaford because we’ve been doing it here for years.

Waterproofing Process Seaford NY
First, we inspect your basement to find exactly where water is coming in and why. Every home is different, and cookie-cutter solutions don’t work. We look at your foundation walls, check for cracks, examine the grading around your home, and identify all the entry points.
Next, we create a waterproofing plan that addresses your specific situation. This might include interior basement waterproofing with drainage systems, exterior waterproofing to stop water before it reaches your foundation, or both. We explain exactly what we’re doing and why.
Then we execute the plan using professional-grade materials and proven techniques. We seal foundation cracks properly, install drainage where needed, and apply waterproofing systems that are designed to last decades, not just a few years.

Ready to get started?
Explore More Services
About Diamond Masonry & Waterproofing
Get a Free Consultation
Basement Sealing Services Seaford
Our basement waterproofing services include both interior and exterior solutions because different problems require different approaches. Interior waterproofing handles water that’s already finding its way in – we install drainage systems, apply basement wall sealers, and create pathways for water to exit safely.
Exterior basement waterproofing stops water before it becomes a problem. We excavate around your foundation when necessary, apply professional waterproofing membranes, and ensure proper drainage away from your home.
We also handle foundation crack repair, because cracks are often how water gets in. Whether it’s settling cracks or more serious structural issues, we have the masonry expertise to fix the foundation and then waterproof it properly. Every job includes the right materials for Long Island’s climate and soil conditions.

How long does basement waterproofing last in Seaford?
What's the difference between interior and exterior basement waterproofing?
How much does basement waterproofing cost in Seaford?
Will waterproofing fix the musty smell in my basement?
Can you waterproof basements during winter in New York?
Do you guarantee your basement waterproofing work?
Local Resources
- Google Map Link
- Find the Seaford, NY USPS
- Locate Nearby Seaford, NY Pharmacies
- View the Current Weather in Seaford, NY
- Seaford, NY is located in Nassau county in New York State