The Johns Manville R-13 Wall Kraft Faced Fiberglass Roll Insulation is a high-quality insulation product designed for both exterior and interior walls. This 40-SQ Ft roll of fiberglass insulation features an R-13 insulation value, providing excellent thermal insulation to keep your home warm in the winter and cool in the summer. The kraft facing adds an extra layer of protection and the fiberglass material ensures durability and fire resistance. Weighing 12 lb, this insulation is easy to handle and install, making it a reliable choice for any building project. 15.00 per a roll