Basement Waterproofing
Merrick, NY
Family-owned since 2000. Serving Merrick and all of Nassau County. Free estimates, 24/7 emergency service.
Why Merrick Basements Flood
Merrick sits directly on Nassau County's south shore, where a shallow water table and frequent nor'easters make basement flooding one of the most common home problems in the area.
Merrick homes — especially those near Merrick Road and the waterways — deal with hydrostatic pressure year-round. The sandy soil absorbs water fast but also holds moisture against foundations for weeks after a storm.
GET FREE ASSESSMENTWARNING SIGNS IN YOUR MERRICK HOME
- ⚠Water on basement floor after rain
- ⚠Damp or wet foundation walls
- ⚠White mineral deposits on walls
- ⚠Musty smell or visible mold
- ⚠Cracks in foundation walls or floor
- ⚠Sump pump running constantly
Seeing any of these? Call now — free assessment:
📞 CALL 516-920-2543Waterproofing & Masonry Services
Every service below is available to Merrick homeowners. Free estimate on every job.
French Drain Systems
Redirects groundwater away before it can flood your basement. One of our most common solutions in Merrick given the area's water table conditions.
Learn MoreSump Pump Installation
We install submersible pumps with battery backup — critical for Merrick homeowners who need protection when Long Island storms knock out power.
Learn MoreFoundation Crack Repair
High-performance epoxy and polyurethane injection seals cracks permanently. Most repairs done from inside — no excavation needed.
Learn MoreExterior Membranes
90-mil membrane applied directly to your foundation walls — stops water at the source before it ever contacts your home.
Learn MoreInterior Drainage Systems
Perimeter drainage channels capture water and route it to a sump basin. Fast installation with no disruption to your yard or landscaping.
Learn MoreMasonry & Concrete
Pavers, stoops, retaining walls, concrete, and more. The same family that fixes your basement can transform your outdoor space.
Learn MoreWhat Nassau County Homeowners Say
"My basement would flood during heavy rains and my husband and I would have a lot of anxiety. Diamond's professionalism made us feel comfortable and the french drain system they installed is the best investment — not having to worry about our basement flooding again."
Ready for a Dry Basement in Merrick?
Free estimate. No pressure. We've been serving Nassau County since 2000.