Building Envelope Solutions
Insulation for apartment buildings
We insulate apartment buildings, co-ops and condos across New York City and Long Island. In most buildings the biggest heat loss is at the top: the roof, the top-floor ceilings and the stair bulkhead. Then come the gaps at shafts, pipe chases and windows.
What we do
- Roofs: dense-pack cellulose into the roof cavity, closed-cell spray foam under the deck, or insulation above the deck during a roof replacement.
- Walls: blown-in insulation for framed walls, spray foam when walls are opened.
- Air sealing: bulkheads, shafts, pipe chases, the roof edge and the cellar.
- Soundproofing: mineral wool between units and floors.
Utility programs for 5+ unit buildings
Buildings with 5 or more units usually follow a utility multifamily track: the Con Edison multifamily program for Con Edison buildings, National Grid multifamily weatherization for National Grid gas buildings, and affordable multifamily programs where a building qualifies. Incentives are usually calculated per apartment. We handle the application, the inspections and the paperwork. See the NYC rebate guide. For 2027, Con Edison and National Grid plan one joint weatherization program for market-rate buildings.
Local Law 97
Larger buildings face emissions limits under Local Law 97. Roof insulation and air sealing lower heating use, which lowers emissions.
Working with your building
We work with boards, owners and managing agents, send certificates of insurance before we start, and schedule around residents.
By borough
- Brooklyn and Manhattan: brownstone conversions, walk-ups, co-ops and condos.
- The Bronx: pre-war buildings where the roof is usually the first step.
- Queens: garden apartments and co-ops.
Common questions
Can residents stay during the work? Usually yes. We close off only the area we are working in.
Who files the rebate? We do, as a participating contractor.
Is the estimate free? Yes. Call (347) 200-5089.