The layer is not

The minimum layer for effective insulation is 100 millimeters, while it is recommended to select high -density mineral wool. The layer is not to install 200 millimeters thicker: an excess of insulation can lead to cracks and detach thermal insulation. The inevitable consequence of low vapor permeability is, alas, and a decrease in the heat -protective properties of the material. In addition, wet mineral wool dries for a long time.