Exterior and interior
Waterproofing Contractor in the Bronx and NYC
Bronx waterproofing contractor for basements, foundations and exterior walls. Leak diagnosis and permanent fixes. Call (347) 515-8989.
Water in a basement or through a wall is a symptom. The cause is usually outside the building, in grading, in a failed exterior membrane, in blocked drainage or in a masonry wall that has stopped shedding water. Interior sealers alone rarely solve it.
We diagnose where the water is entering, then fix it at the source. That may mean excavating and membraning the foundation, correcting grade, repointing an exposed wall, or a combination.
What this service covers
- Exterior foundation waterproofing
- Basement leak diagnosis and repair
- French drains and drainage systems
- Masonry wall water sealing
- Crawl space moisture control
- Sump pump installation
Get a price on waterproofing
- Phone
- (347) 515-8989
- License
- NYC HIC 2037327-DCA
- Hours
- 7 days, 7:30am to 9pm
- Estimate
- Free and on site
When to call us
Signs you need waterproofing
If you recognise any of these, it is worth having someone look before it gets more expensive.
- Damp or standing water after heavy rain
- White mineral deposits on basement walls
- Musty smell that does not clear
- Paint or plaster lifting near the floor
What causes it
Why this happens
Water finds a basement in a predictable order. First surface water, from grading that slopes toward the house or downspouts discharging at the foundation. Then hydrostatic pressure, where saturated soil pushes water through the wall or up at the floor joint. The first is cheap to fix and gets checked before anything else. Contractors who lead with an interior system without looking at your gutters are selling, not diagnosing.
Budget guidance
What waterproofing costs in NYC
Correcting grading and downspout discharge often runs under 2,000 dollars and solves more basements than people expect. Interior drainage systems with a sump typically run 60 to 110 dollars per linear foot. Exterior excavation and membrane, which is the permanent solution, runs considerably higher because of the excavation itself.
These are indicative ranges to help you budget, not a quote. Every building is different and we price after seeing the job.
What we work with
Materials and systems
- Exterior rubberised membrane systems
- Interior drainage channel and sump pumps
- French drains and dry wells
- Crystalline and cementitious coatings
How it works
Straightforward from the first call
You call, and we prioritise leaks
Active water entry gets scheduled ahead of planned work.
We trace the leak to its source
Water travels. We find where it gets in rather than where it shows up.
Temporary seal if needed
On a live leak we stop the water first, then price the permanent repair.
Repair or replacement, properly detailed
Flashings, terminations and drainage handled, not just the field of the roof.
Where we do this work
Waterproofing across NYC and Westchester
We carry out waterproofing throughout the Bronx, Queens, Brooklyn, Manhattan and Westchester County, on residential and commercial property.
Related services
Often needed alongside this
Most exterior problems have more than one cause. These are the services we most often carry out on the same building.
All servicesQuestions
Waterproofing questions
Interior or exterior waterproofing?
Exterior is the permanent fix because it stops water before it reaches the structure. Interior systems manage water that is already in and are the right call when excavation is not possible.
Why is my basement wet only after heavy rain?
That pattern usually points to surface water, meaning grading, gutters or downspouts discharging next to the foundation. Those are the cheapest problems to fix and we always check them first.
Does waterproofing come with a guarantee?
We stand behind our work in writing. The specifics depend on the system used and the condition of the structure, and it is set out in your scope before work starts.
Free on site estimate
Need waterproofing in the Bronx or NYC?
Call us or send a message and we will arrange a free on site estimate at a time that suits you.