Why Waterproofing Is Critical for Brooklyn Buildings
Brooklyn receives over 46 inches of rainfall per year, plus snow and ice. Every penetration in your building envelope — windows, doors, electrical outlets, pipes, and even tiny cracks in stucco — is a potential entry point for water. Once water gets behind the exterior cladding, it causes wood rot, mold growth, structural damage, and insulation failure.
Waterproofing is not just a product — it's a system. Air barriers, moisture barriers, flashing, sealants, and drainage must all work together. MNM Construction designs and installs complete waterproofing systems that address every component of your building envelope.
Did You Know? The majority of stucco failure in Brooklyn is caused by water infiltration — not by the stucco itself. Proper waterproofing behind the stucco is what determines how long the system lasts. Never install stucco without a proper moisture barrier underneath.
Waterproofing Services We Provide
Air & Moisture Barriers
StoGuard, Henry Blueskin, and Tyvek fluid-applied and sheet membrane barriers installed over wall sheathing before stucco or EIFS. The foundation of any weathertight building envelope.
Elastomeric Coatings
Flexible waterproof coatings applied over existing stucco to seal cracks, stop water penetration, and extend the life of aging stucco systems. Available in hundreds of colors.
Window & Door Flashing
Proper flashing and sealant at all window, door, and penetration openings. The #1 place water enters buildings — and the most critical detail in any waterproofing system.
Parex WeatherSeal
Parex's premium waterproofing system for stucco buildings. Vapor-permeable so the wall can breathe while keeping liquid water out. Superior flexibility and UV resistance.
Foundation Waterproofing
Below-grade waterproofing for foundation walls, basement walls, and retaining walls. Keeps water out of your basement and protects the structural elements of your building.
Deck & Balcony Waterproofing
Traffic-bearing waterproof membranes for concrete decks, balconies, and roof decks. Essential for any elevated concrete surface in Brooklyn.
Signs Your Building Needs Waterproofing
- Water stains on interior walls near windows or at the base of exterior walls
- Efflorescence (white chalky deposits) on stucco or masonry
- Peeling paint on interior walls near exterior walls
- Musty smell in the basement or lower floors
- Visible mold or mildew growth on walls
- Stucco cracks that reappear after being patched
- Rust stains running down exterior walls from window frames
- Gaps or missing caulk around windows, doors, or utility penetrations
Our Waterproofing Systems
- StoGuard — fluid-applied air and moisture barrier, vapor-permeable, seamless coverage
- Parex WeatherSeal — elastomeric waterproof coating for stucco and masonry
- Henry Blueskin — self-adhering sheet membrane for high-risk areas
- Tremco Spectrem — high-performance sealant for expansion joints and penetrations
- Dryvit Weatherlastic — elastomeric finish coat with built-in waterproofing
- Thoroseal — crystalline waterproofing for masonry and concrete