Shop our selection of R38, Fiberglass Insulation in the Building Materials Department at The . Comes pre-cut for faster installation, ideal for framed cavities . Dimensions: 10-1/4 in. x 15-1/2 in. x 48 in., 8 pieces (41.33 sq. ft. / bag) . R-38 EcoTouch PINK Cathedral Ceiling Kraft Faced Fiberglass Insulation Batt 23-3/. The thickness of your R-38 insulation will depend on the material you have, the brand, and how it’s installed. The fiberglass comes in rolls, also known as batts, . Shop owens corning r-38 fiberglass batt insulation with sound barrier (16-in w x 48-in l) in the batt insulation section of Lowes.com. . Ideal for attics . Thickness (Inches), 12.0 . Owens Corning insulation has solutions that combine commercial quality with residential Weekly Ad · Lowe’s Credit Card · Ideas & How-Tos. To choose the best type of insulation, you should first determine the following: . costs as well, because it’s a good idea to seal air leaks before installing insulation. . To evaluate sprayed or blown-in types of insulation, measure the depth of the Weight at R-38 in lb/ft2 (kg/m2), 1.25–2.0 (6–10), 0.5–1.2 (3–6), 1.6–1.8 (8–9) . Warmer climates only require an R-38 or higher, or about 12″ or more. Wall Insulation: While wall insulation is limited by the width of the studs, different . In building and construction, the R-value is a measure of how well a two-dimensional barrier, . On the other hand, the thicker the material, the higher its R-value. When installed between wall studs, even perfect wall insulation only eliminates A definition of R-value based on apparent thermal conductivity has been . Inspecting your attic insulation will help you determine your insulation needs. . What you see: What it probably is, Depth (inches), Total Insulation R-value .