HESP Weatherization
Basement Insulation
- Defined as basement, crawlspace or other unconditioned space directly below a conditioned living area
- Upgraded by insulating:
- Foundation walls from 2 feet below grade to underside of first floor (including sill and band joist) with minimum 2” rigid or closed-cell spray foam, or
- Basement or crawlspace ceiling with either dense-pack insulation or minimum 2” of foam
- Mobile home underbelly with blown fiberglass insulation
- Batt insulation not eligible for rebates
- Upgrade must be followed by a Building Performance Institute (BPI) Safety Test
- Code-approved fire protection was added to foam insulation when applicable