All services
Mechanical
Insulation & Air Sealing
The cheapest comfort upgrade you can make.
Typical cost
$1,500 – $6,500
Project timeline
1 – 2 days
Category
Mechanical
Most homes lose more energy to air leaks than to under-insulation. A blower-door test pinpoints what to fix first — and which utility rebates apply.
When to call
- Attic insulation under R-30
- Drafty floors over a crawl space
- High heating or cooling bills
- Knob-and-tube wiring still present
What's included in a good bid
- Blower-door diagnostic
- Air sealing of attic and rim joists
- Blown-in cellulose or spray foam
- Rebate paperwork support