The roof preserves the thermal comfort of the inhabitants by protecting the building from sun, rain, wind and snow and limiting heat in summer and cold in winter. This element is also an integral part of the exterior house aestheticism, and can be converted into a charming living area inside. The attic now becomes a heated loft which requires the heat losses to be limited


The roof is one of the most critical elements of the building envelope in relation to heat losses, air flows and moisture control. Warm air naturally rises because of its low density and tends to leak out through the roof. Moisture is transported with the air in the form of water vapour which can condense inside the construction, leading to consequential damages. Since some 30% of building heat losses occur in poorly insulated roofs, it is important to implement a perfect solution including high performance insulation, airtightness and a moisture management system. 

The result: 

Installation of insulation
  • decreased energy consumption and significant cost savings
  • improved thermal comfort and air quality without unpleasant air flows
  • no moisture propagation inside the construction
In lofts, the insulation materials are installed in between the rafters. In some cases, a second layer of insulation can also be installed below the rafters. The airtightness layer is normally provided with membranes installed on the heated side of the construction.

Overview of loft solutions

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