Unfaced insulation is ideal for new construction, remodels, and interior walls, floors, ceilings, basements, attics, and crawlspaces that do not require moisture control.
Use R-13 or R-15 kraft-faced fiberglass or mineral wool insulation for 2x4 walls to ensure proper insulation.
The thickness of R38 batt insulation is usually about 12 inches. This substantial thickness helps to provide excellent thermal resistance, making it a popular choice for insulating attics and other areas where maintaining a high level of energy efficiency is crucial.