The aim of the TETRA project is to prepare all parties involved in the construction of insulated inner floor thoroughly for the changes that are coming in 2020 in response to build European legislation on energienetraal. Specifically for solatiematerialen in floors, these materials not only perform an insulating function but also to ensure the strength and stability of the floor. For example, but to apply the present insulation materials in higher thicknesses may result in the floor to the occurrence of unacceptable compressions of these materials under the influence of loads on the floor, up to large deformations and damage.