JM Unfaced Formaldehyde-free fiberglass insulation offers R-values ranging from R-11 to R-38 and provides effective thermal and noise control. Our R-13 batts come in pre-cut lengths for insulating standard 8 ft. wall cavities. R-13 unfaced batts are perfect for insulating 15 in., 2 in. x 4 in. walls to control unwanted noise. 1-bag covers 106.56 sq. ft. Unfaced batts are great for new construction, remodels, walls, floors, ceilings, basements, attics and crawlspaces, and are available for wood or steel stud framing. They can be used with a separate vapor retarder when moisture control is required. JM insulation is made from bonded glass fibers that are dimensionally stable and will not slump within the cavity, settle or break down during normal applications.
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