Craft

Fiberglass Batt Insulation

Flexible mineral-fiber insulation for stud bays and attics. R-value depends on thickness and density; compression destroys performance.

Typical coverage

88 ft²/package

varies by R-value; printed on packaging

Sold as

Packages

R-13: ~88 ft² · R-19: ~60 ft² (typical)

Field-tested tips

  • Fit without compression
  • Vapor-retarder facing per climate — verify local practice
  • Respirator and coveralls for installation

Plan the quantity

Room Volume Calculator

Cubic feet and cubic meters of any room.

Insulation Calculator

Batt or roll packages for a target R-value.

BTU / AC Sizing Estimator

Preliminary cooling load for room air conditioners.