GACO Silicone, Henry 287 Silicone, GAF Unisil. Karnak acrylic. Tropical SBS-based fluid-applied. Tremco TPO/EPDM-compatible coatings. Polyester reinforcement mesh. Lead-coated copper through-wall flashing.
How much does a roof coating cost in NYC?
Silicone coating (best long-term): $3.50–$5.50/sq ft. Acrylic coating: $2.50–$4/sq ft. Two-coat elastomeric: $3–$5/sq ft. A 1,500 sq ft Queens flat roof typically runs $4,500–$8,000. About 30–50% the cost of full replacement.
How long does a silicone roof coating last?
15–20 years with proper application. Silicone is the gold standard — UV resistant, ponding water resistant, and re-coatable indefinitely. Acrylic coatings last 7–12 years and are not ponding-water rated.
When does a roof coating make sense?
When your existing roof is structurally sound but aging — usually 12–18 years old. Coatings extend life by 10–15 years at 30–50% of replacement cost. They don't work on roofs with major insulation moisture, structural issues, or membrane failure.
Will a white roof coating lower my AC bills?
Yes — reflective white coatings can lower roof surface temperature by 50–80°F on hot days. NYC studies show 15–25% reduction in AC costs. The NYC CoolRoofs program offers free coatings on eligible buildings.
What is parapet wall waterproofing?
Parapet walls (the short walls extending above the roof on row houses, brownstones, and commercial buildings) are a major leak source in NYC. We seal the masonry, install proper coping caps, repair through-wall flashing, and apply elastomeric coatings to stop water from entering through the wall.
