A variety of European -shifers Ondulin is a recycled cellulose and fiberglass, which are saturated with a bitumen composition. A large number of textures and the choice of ondulin flowers are presented on the roofing market. This material is light enough. One leaf ondulina by its weight no more than five kilograms. It can be put on the old roof, thanks to its reliability and noiselessness. Performing the installation of Ondulin, you should pay your attention to the hollows and crate. If you need a mastumen waterproofing mastic, then you should follow the exile.