Abstract: Polyurethane foam materials are produced and used in batt form, and therefore are substitutes for insulation batts previously made of fibreglass insulation The polyurethane batts are preferably made of a flexible, and compressible foam material, such that the batts can be compressed and placed within a shipping container, and so that the compressed batt will form a friction fit in an opening, when in use An alternative insulation material and format are provided.