Foam Fillers are made from bitumen- impregnated polyurethane. They form the most cost effective solution in: Water- proofing Vermin- proofing Dust- proofing roof or ceiling space Foam fillers have the same shape as the roofing profiles and are hence easy to install. They are designed slightly larger than the roofing profiles, so as to fit snugly at both the eaves and ridges.