Glass wool can

Glass wool can be called one of the most affordable methods for warming the roof, although this method of insulation has its drawbacks and flaws. You can start with the fact that in ecological purity of glass wool is inferior to many materials, it slides from vertical or sloping surfaces and is easily deformed. From this we can conclude that if for a flat roof the use of glass wool is permissible, then for inclined roofs it will not work.