Building Envelope Solutions
Air sealing comes first
Insulation slows heat, but it doesn’t stop air. Gaps around pipes, wires, chimneys, lights and hatches let warm air escape all winter. Sealing them is the cheapest way to make a house more comfortable, and it lets the insulation work.
Split-levels, colonials and capes on Staten Island have many places where heated rooms meet unheated space, and each one leaks.
Where we seal
- Attic floor and hatch: around pipes, wires and lights.
- Knee walls and bonus rooms: where side attics meet heated rooms.
- Garage ceilings and rim joists: below living space.
How we find the leaks
A blower door test depressurizes the house so leaks show up. We test before and after where a program calls for it, so you can see the difference in numbers.
Rebates
Staten Island has National Grid gas and Con Edison electric. Most one- to four-family homes now go through NYSERDA programs. For 2027, Con Edison and National Grid plan one joint weatherization program for market-rate homes and apartment buildings. We check what is open for your address before we price the job. See the NYC rebate guide.
Common questions
Will sealing make my house stuffy? We seal the leaks you don’t want, such as attic bypasses and rim joists. If a house gets very tight, we tell you whether it needs ventilation.
How long does it take? Most homes take a day, often together with attic insulation.