What level of thermal insulation do rubber granulate floor coverings provide?
Rubber granulate floor coverings provide noticeable thermal insulation, with their effectiveness depending on factors such as density, panel thickness, and internal structure. They do not replace the legally required insulation for flat roofs, balconies, or basements, but they do enhance overall comfort. In unheated basements, market stalls, terraces, workshops, or fitness rooms, a well-selected rubber granulate floor ensures a pleasant floor feel – especially when walking barefoot, sitting, or playing.
Some customers from Spain and Italy report that spaces beneath roof terraces remain significantly cooler in summer when terrace slabs at least 30 mm thick are installed.
Thermal insulation is measured by thermal conductivity (λ), where a low λ-value indicates good insulation. While rubber has a value of approximately 0.16 W/(m·K), EPS (polystyrene) is around 0.03 W/(m·K) and marble about 2.8 W/(m·K). In practice, rubber granulate floors achieve λ-values between 0.15 and 0.07 W/(m·K). The comparison value provided in the product description offers a good indication of the actual thermal insulation.