Pitched roofs can be insulated, either internally (mainly in renovation) or externally.
In both cases there is a need for ventilation to avoid water vapor condensation.
The roofs can be split into wooden and those that are made from concrete. Depending on the type of the tile that will be used, the choice of the configuration of the final receiving surface of the tiles is made.
Roofs under which people usually live or work are considered warm roofs. In this case the thermal insulation is done either externally or internally on the pitched surface of the roof. In the case where there is a horizontal slab between the roof area and the living area, with limited traffic, then the roof is characterized as cold. In this case the thermal insulation is done on the horizontal part of the construction.
Thermal insulation materials intended for the thermal insulation of pitched roofs must have properties suitable for the application, such as:
• Low coefficient of thermal conductivity λ
• Resistance to water vapor permeability, to reduce the risk of water vapor condensation in the contact area of the concrete element and insulation material, when the board is installed internally.
• Ease of handling in terms of weight, dimensions, mechanical strength and the way the material is fastened.
• Ease of cutting, shaping and adapting to the shapes of the roof elements.
• Possibility of good assembly of the pieces of insulating material, in order to avoid thermal bridges and water vapor condensation lines at its joints.