Waterproofing & leak repair in the Bronx
In Bronx apartment buildings, a leak is rarely just a leak. It’s a tenant complaint, a possible HPD violation and a ceiling that keeps getting repainted. We fix where the water starts.
Pre-war Bronx apartment buildings leak at the roof edge, the parapet, around windows and through masonry with open joints. When the same apartments keep getting cited, the problem is usually outside: a failed coping, missing flashing, or a section of wall that needs repointing and sealing. We investigate from both sides and document what we find.
Below, cellars and boiler rooms in older buildings can take on water through foundation walls and slab joints, and homes in Throgs Neck, City Island and other low-lying areas near the water deal with flooding. We explain options honestly, including what a building can’t fully fix from inside.
Buildings we work on in Bronx
- Pre-war apartment buildings with recurring leak complaints
- Parapets, copings and roof edges
- Cellars and boiler rooms
- Two- and three-family homes, including waterfront areas
What Bronx owners should know
General information only, not legal advice. Confirm requirements with the issuing NYC agency.
HPD violations
HPD cites leaks and water damage in rental units by class (A, B, C). Repairing the exterior source is often what makes the correction last.
Parapet observations
Street-facing parapets generally need annual observations; parapet defects are a common leak source.
Local Law 11 / FISP
Taller buildings’ FISP reports may include waterproofing and sealant repairs.
Flooding
NYC DEP’s flood-prevention guidance applies to waterfront and low-lying homes.
Waterproofing services in Bronx
- Basement waterproofing
- Foundation waterproofing
- Below-grade waterproofing
- Facade waterproofing
- Roof & parapet waterproofing
- Leak investigation
Related:
Waterproofing questions in Bronx
Can you provide documentation for HPD certification?
We provide photos, a description of the work and invoices that you or your expediter can use when certifying correction.
Our top-floor tenants keep reporting leaks. Is it the roof?
Sometimes. Just as often it’s the parapet or the wall below the roof line. We check the roof, flashing and parapet together.
Do you waterproof cellars and boiler rooms?
Yes: crack and joint repair, coatings and below-grade work where accessible.
Waterproofing in other boroughs: Brooklyn · Queens · Manhattan · Staten Island
Other services in The Bronx: Masonry · Tuckpointing · Concrete · Roofing
Waterproofing guides
Plain-English answers to the questions NYC owners ask us most, with links to the official City sources.
7 Signs Your Brick Needs Repointing (and What Proper Repointing Involves)
Eroded and cracked joints, spalling brick, efflorescence and interior damp — what they mean and how proper repointing is done.
Read the guide →GuideBasement Waterproofing Options for NYC Homes: What Actually Works
Figure out where the water comes from, then compare drainage fixes, crack injection, interior systems and exterior membranes.
Read the guide →Need waterproofing work in The Bronx?
Tell us what’s going on and we’ll schedule a free estimate.