Martin Correctly Used Various Building Materials to Warm His House. For Example, The Walls of the House Are Insulated with Mineral Wool Mats with A Total Thickness of Up To 80 MM, and Under the Roof the Same Heat IS Already Laid in A Layer of 180 mm , to insulate the Flooring of the Floor, Foamed Polystyrene with a Thickness of Only 100 Mm Was Used.