- This 15"x40" fiberglass insulation reduces heating and cooling costs by increasing the insulating value of walls, ceilings, and floors
- Keep your house warmer in the winter and cooler in the summer
- Easy, DIY installation
- Thickness: R11 3-1/2-inch, R13 3-5/8-inch, and R19 Kraft 6-1/2-inch, R19 unfaced 6-1/4-inch
- Product Details
Size 15" x 40"