Google ReviewsKeep Water Out of Your Basement for Good
On Islip's flat South Shore lots, rainwater has nowhere to run, and if the ground around a house slopes the wrong way, it collects right against the foundation. Over the years, that standing water finds every crack and joint in an older basement.
Promaster Maintenance Corp waterproofs foundations and basements throughout Islip, just along the South Shore from our West Babylon base. We stop leaks at the source and protect the structure your home sits on. We also work in East Islip, Islip Terrace, Great River and Oakdale.
Neighbors Who Called Us
Real reviews from homeowners across Suffolk County, pulled live from Google. See why Islip homeowners choose Promaster. (631) 333-6373.
Signs Your Foundation Needs Waterproofing in Islip
Most basement water problems in Islip start with small signs. Look out for:
- Water stains or dampness on basement walls or floors
- Peeling paint or bubbling on basement walls
- A musty smell or patches of mold
- Cracks in foundation walls or the basement floor
- White, chalky efflorescence on concrete or block
All of these mean moisture is moving through the foundation, and the damage grows the longer it is left.
Exterior Foundation Waterproofing in Islip, NY
The International Residential Code requires below-grade foundation walls to be dampproofed, and waterproofed where groundwater is high. On flat Islip lots, the final grading matters as much as the membrane. 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
- Backfilling and regrading so surface water runs away from the house
Fixing the grading along with the walls stops water collecting against the foundation in the first place.
Interior Basement Waterproofing and Drainage in Islip, NY
When excavating is not practical, for example beside a driveway or a mature tree, an interior system manages water that reaches the basement. We install:
Interior drainage relieves the hydrostatic pressure that forces groundwater through cracks and joints.
- Interior waterproofing coatings and sealants
- Sump pumps that remove collected water automatically
- French drains that collect water along the foundation
Call our foundation waterproofing experts today on (631) 333-6373
Prefer to message? WhatsApp usFoundation and Basement Crack Repair in Islip, NY
Cracks in an older Islip basement are often the main way water gets in. We repair:
- Basement floor and slab cracks
- Foundation wall cracks
- Leaks around pipes and wall joints
Before repairing, we check whether a crack is caused by settling or structural movement, since that decides the right fix.
Crawl Space Repairs and Foundation Underpinning
Where water has been getting in for a long time, the damage can reach the structure itself. We provide:
- Foundation underpinning to stabilize settling or sinking foundations
- Crawl space repairs for moisture, rot and damaged supports
Getting the structure stable first gives your waterproofing the best chance to work.
How Much Does Foundation Waterproofing Cost in Islip, NY?
We price each Islip job after a free, no-obligation inspection at your home. The main cost factors are:
- Exterior waterproofing, an interior system or a combination
- The number of walls and the depth of the foundation
- Regrading needed to move water away on a flat lot
- Access around driveways, trees and landscaping
- Crack repairs
- Any crawl space or underpinning work
Why Choose Promaster Maintenance Corp for Foundation Waterproofing in Islip, NY
Islip is part of our home stretch of the South Shore. When you call us, you get:
A detailed inspection that finds where and why water is entering
A solution designed for your property
Expert repairs from a licensed, insured and trained team
A thorough cleanup when the work is done
More than 400 completed projects and 40 years of generational experience
- Family owned
- Rapid response
- Premium service
Rated and reviewed by Long Island homeowners
Our reviews often describe the team as professional from the first visit to the last. Call Promaster Maintenance Corp at (631) 333-6373 to find out why your Islip basement is getting wet.
Call NowFoundation Waterproofing FAQs for Islip, NY
Straight answers from the Promaster team.
More Ways We Can Help
Looking for a service other than Foundation Waterproofing in Islip?
We provide a whole range of masonry, paving and roofing services for our Islip clients:
Not in Islip? Still looking for Foundation Waterproofing near you?
Including Brentwood, Babylon, Ronkonkoma, Patchogue, Medford & Huntington:
- Foundation Waterproofing Brentwood
- Foundation Waterproofing Babylon
- Foundation Waterproofing Ronkonkoma
- Foundation Waterproofing Patchogue
- Foundation Waterproofing Medford
- Foundation Waterproofing Huntington
We also provide Foundation Waterproofing in Shirley and Montauk.