Elevated terraces installed on thermal insulation and supported by pedestals are susceptible to deflection due to the reduced hardness of the substrate compared to, for example, a concrete substrate. However, it is possible to successfully install an elevated terrace on thermal insulation if the insulation has the appropriate hardness. It is important to note that the minimum acceptable hardness of the substrate is 200 kPa/m2, while the recommended hardness is 300 kPa/m2. By ensuring these parameters, we can avoid the risk of substrate deflection.
In the case of the thermal insulation layer, it is often necessary to use a top covering membrane or another protective layer to shield the insulation from UV radiation and oxidation, in accordance with the recommendations of the insulation manufacturer and construction standards.
