Heat Insulation of existing roof

In an existing roof we apply the same method of insulation of the inverted roof. Usually in old buildings the roof with inclinations or without has mosaic as final layer. If inclinations are checked and are incorrect or needs to be improved it will be suggested the use of light weight concrete produced with special grains of Expanded Polystyrene ISOLBETON in the density of 300kg/m3 for the smaller possible cost of manufacture, but also for additional heat and sound insulation. Afterwards the sealing layer is applied and above this the heat insulating layer. Above the heat insulating layer geo-fabric is laid that filters the rainwater for mud, dust and waste keeping the passages to the endings of gutters clear, but also protecting and the heat insulating layer from the sun. If the roof is not often used therefore accesability is not required, shingles can be used. If however is often used then it is required the addition of tiles above the heat insulating layer and it is always advisable to use a spacer in the joints of plates so as to create a layer of airing. The airing in the roof is essential and particularly beneficial in our country due to the intense and frequent sunlight. It facilitates the operation of the heat insulation and averts overheating.

In existing roof is suggested the use of pressed Expanded Polystyrene with very low water absorbance such as PERIPOR EPS 200 or ISOPOR EPS 200 in the suitable thickness according to the regulation of Energy Efficiency of Buildings.