HESP Weatherization
Attic Insulation
- Attic must be air sealed prior to or as part of insulating the attic
- Attic must be insulated to one of the following levels:
- Open attic insulated to at least R49
- Enclosed cavities filled to capacity with dense-pack insulation
- A minimum of 5” of high density spray foam on all attic surfaces
- High density spray foam was applied to within 1.5” of the surface of cavities that were subsequently enclosed
- Batt insulation not eligible for rebates
- All exhaust fans must be ducted outside the home (required for jobs completed on or after 4/1/2020)
- Upgrade must be followed by a Building Performance Institute (BPI) Safety Test
- Code-approved fire protection must be added to foam insulation when applicable