2 calculators

Insulation calculators

Your climate zone by county and the insulation the energy code calls for: attic, walls, floors and basements.

What Climate Zone Am I In?

Find your IECC climate zone by ZIP code, city or county, and the insulation R-values the energy code requires for your attic, walls, floors and basement.

Insulation

Get batt bags for walls, floors and attics, or bags of blown-in fiberglass or cellulose to reach your target R-value, by attic size.

Climate Zones by State

Every county's 2021 IECC zone, state by state.