Google ReviewsKeep Water Out of Your Basement for Good
Shirley's low-lying ground near the bay and Smith Point means groundwater is rarely far below the surface, and coastal storms can saturate the soil in a matter of hours. For homes with basements or crawl spaces, that is a constant source of pressure on the foundation.
Promaster Maintenance Corp waterproofs foundations and basements across Shirley, stopping water at the source and keeping the space below your home dry. We also work in Mastic, Mastic Beach, Ridge and Yaphank.
Neighbors Who Called Us
Real reviews from homeowners across Suffolk County, pulled live from Google. See why Shirley homeowners choose Promaster. (631) 333-6373.
Signs Your Foundation Needs Waterproofing in Shirley
After a coastal storm, look for:
- Water or dampness on basement floors or walls
- A musty smell or visible mold
- White, chalky efflorescence on concrete or block
- Cracks in foundation walls or floors
- Peeling paint or bubbling on basement walls
Each of these is a sign of moisture moving through your foundation, and storms will keep making it worse.
Exterior Foundation Waterproofing in Shirley, NY
The International Residential Code requires below-grade foundation walls to be dampproofed, and fully waterproofed where groundwater is high, which fits much of Shirley near the water. Our process is:
- Excavating along the foundation to expose the walls
- Cleaning and repairing cracks in the concrete
- Applying a waterproofing membrane or bentonite barrier
- Installing drainage to carry water away from the house
- Backfilling and grading so storm water flows away
Exterior waterproofing is widely considered the most thorough way to keep high groundwater out.
Interior Basement Waterproofing and Drainage in Shirley, NY
Where excavation is not practical, an interior system handles the water that reaches the basement. We install:
With groundwater this close to the surface, relieving hydrostatic pressure is often what keeps a Shirley basement dry after storms.
- Sump pumps that remove collected water automatically
- French drains that collect water along the foundation
- Interior waterproofing coatings and sealants
Call our foundation waterproofing experts today on (631) 333-6373
Prefer to message? WhatsApp usFoundation and Basement Crack Repair in Shirley, NY
Under pressure from saturated ground, even small cracks let water in. We repair:
- Basement floor and slab cracks
- Foundation wall cracks
- Leaks around pipes and wall joints
We check whether a crack is caused by settling or structural movement before deciding on the repair.
Crawl Space Repairs and Foundation Underpinning
Damp ground takes a toll on crawl spaces and foundations alike. We provide:
- Crawl space repairs for moisture, rot and damaged supports
- Foundation underpinning to stabilize settling or sinking foundations
Stabilizing the structure first helps your waterproofing perform as it should.
How Much Does Foundation Waterproofing Cost in Shirley, NY?
We price every Shirley project after a free, no-obligation inspection. The main cost factors are:
- Interior drainage, exterior waterproofing or both
- Sump pump requirements on high groundwater
- The number of walls and depth of the foundation
- Crawl space repairs
- Crack repairs
- Access around the house
Why Choose Promaster Maintenance Corp for Foundation Waterproofing in Shirley, NY
High groundwater and coastal storms need a waterproofing solution that is built for them. With us, you get:
A customized solution for your home and its ground conditions
A detailed inspection to find where and why water is getting in
Expert repairs by a licensed, insured and trained team
A thorough cleanup when the work is done
40 years of generational experience
- Family owned
- Rapid response
- Premium service
Rated and reviewed by Long Island homeowners
Customers describe our team as professional from start to finish. Call Promaster Maintenance Corp at (631) 333-6373 to book your Shirley inspection.
Call NowFoundation Waterproofing FAQs for Shirley, NY
Straight answers from the Promaster team.
More Ways We Can Help
Looking for a service other than Foundation Waterproofing in Shirley?
We provide a whole range of masonry, paving and roofing services for our Shirley clients:
Not in Shirley? Still looking for Foundation Waterproofing near you?
Including Medford, Patchogue, Ronkonkoma, Islip, Brentwood & Babylon:
- Foundation Waterproofing Medford
- Foundation Waterproofing Patchogue
- Foundation Waterproofing Ronkonkoma
- Foundation Waterproofing Islip
- Foundation Waterproofing Brentwood
- Foundation Waterproofing Babylon
We also provide Foundation Waterproofing in Huntington and Montauk.