48 in. x 100 ft. Double Reflective Insulation Roll Jan 30, 2021 11:30:38 GMT -6 Quote Select PostDeselect PostLink to PostBack to Top Post by meghan on Jan 30, 2021 11:30:38 GMT -6 48 in. x 100 ft. Double Reflective Insulation Roll1 roll, used about 5 ft.$150 new$100 OBOhere's a link:www.homedepot.com/p/Reflectix-48-in-x-100-ft-Double-Reflective-Insulation-Roll-BP48100/202092205917.365.7672MeghanI used this for insulation under a plywood floor. I think it helps alot.You can also use in walls or ceiling. Wherever you want!