Insulation reduces energy costs, improves comfort, and is often the highest-ROI home improvement project. The Insulation Calculator estimates packages of fiberglass batts or rolls by R-value — from R-11 for interior walls up to R-49 for cold-climate attics. Select the R-value for your application, enter the area, and get an accurate material count.
Batt packages and rolls by R-value for walls, attics, floors, and crawl spaces. R-11 through R-49 coverage.
Batt packages and blown-in bags by attic area and target R-value.
Batt packages for 2x4 and 2x6 exterior wall cavities by room perimeter.
Insulation is typically installed before drywall goes up on walls, and before painting. For attic insulation projects, you may need to calculate lumber for additional framing or blocking.