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Ayat Contracting Inc. provides basement, foundation, roof, and building envelope waterproofing across Brooklyn, Manhattan, Queens, the Bronx, and Staten Island. Water finds the smallest gap in a building’s defenses, and once it’s inside, the visible damage is almost always downstream of the real entry point — our approach is to find and seal that source, not just treat where the water shows up.
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Most water intrusion problems trace back to one of a few common failure points: foundation cracks and hydrostatic pressure pushing groundwater through basement walls, failed roof membrane or flashing at penetrations (vents, HVAC units, parapet walls), deteriorated mortar joints letting water behind a facade, or grading and drainage issues directing water toward a building instead of away from it. A water stain on an interior wall rarely marks the actual entry point — it marks where the water finally became visible after traveling through the structure.
Interior waterproofing (sealants, interior drainage systems, sump pumps) manages water that’s already gotten in — it’s faster and less disruptive, but it doesn’t stop water from entering the structure itself. Exterior waterproofing (membrane application, exterior drainage, foundation coating) addresses the source directly and generally provides longer-lasting protection, but requires excavation access, which makes it a bigger project. We recommend the right approach based on the actual failure point identified during inspection, not a default answer.
Waterproofing done without first identifying the actual entry point often fails within a season or two — we diagnose before we seal, which is why our repairs tend to last. Every project includes a written scope and transparent pricing before work begins.
It depends on the source of the water intrusion, which is why an on-site inspection matters more than a generic recommendation. Active hydrostatic pressure from groundwater often points toward exterior solutions, while isolated cracks or joint failures can sometimes be addressed effectively from the interior.
Cost depends heavily on scope — interior sealant work is far less expensive than exterior excavation and membrane installation. We provide a written estimate after inspection rather than a phone quote, since pricing varies too much by failure type to estimate accurately without seeing the property.
Some materials have minimum application temperatures, so winter waterproofing sometimes requires different products or scheduling around temperature windows. Interior work is generally less weather-dependent than exterior excavation-based work.
Yes — water intrusion is a leading cause of the masonry and facade deterioration that triggers SWARMP ratings, so addressing waterproofing alongside facade repair helps prevent the same issue from recurring at the next inspection cycle.
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