Plan batts for stud walls. Enter the wall, stud spacing and package size for a real package count.
How it works
Length ÷ stud spacing gives bays. Bays × batt width × height, plus 5%, ÷ package coverage.
Before you order
- Split batts around wires and pipes so the cavity stays full.
- Don't compress a batt, since that lowers its R-value.
- Check which side a facer belongs on for your climate and code.
Common questions
What R-value do my walls need?
It varies by climate zone. R-13 to R-21 is typical in framed walls, so confirm your local energy code.
Why are batts wider than the stud gap?
They are sized a little over so friction holds them in place in the framing bay.