Type UBS and UBM dry subfloors
The Frinorm type UBS and UBM dry subfloors have enormous advantages. Contrary to standard subfloors, no additional moisture enters the construction object. Fast progression of construction is enabled because there is no need to dry the floor at all. The outstanding thermal insulation as well as impact- and pressureresistance properties of the prefabricated elements also guarantee excellent impact sound insulation confirmed in independent tests. The dry subfloor can be covered with all kinds of flooring without delay.





The Frinorm type UBS and UBM dry subfloors are suited for loose installation in dry construction in new and renovated buildings without underfloor heating in residential and basement rooms as well as in garages. The dry subfloor has a comparatively low installation height.





  • No construction delays
  • Low installation height
  • Solid and permanent floor in one step
  • Robust surface, water-resistant, impact- and pressure-resistant, non-combustible
  • Can be walked on and subjected to loads immediately
  • Further finishing with all types of flooring possible (ceramic tiles, natural stone, wooden parquet, laminate, PVC flooring, carpet, etc.)
  • Outstanding impact sound insulation
  • Thermal insulation without formation of thermal bridges
  • Two types of dry subfloor: with expanded rigid polystyrene foam (EPS) or with rock wool
  • Dimensionally stable and non-warping
  • Flush surface, perfect board joins
  • Handy format
  • Easy and fast installation, also suited for DIY installation



Product description:


Cover panels Cement-bonded chipboard, 30 mm
Insulation EPS, 15 kg/m³ or rock wool, 160 kg/m³
Thickness 40, 50, 60, 70, 80, 90, 100 mm
Sizes 1650 x 230 mm (0.379 m²)


The Frinorm dry subfloor is available in different designs: type UBS is made of expanded rigid polystyrene foam (EPS), 15 kg/m³, while rock wool, 160 kg/m³, is used for type UBM. Both boards are covered with a 30 mm thick cement-bonded chipboard, which is not only water- and impact-resistant, but also non-combustible. The circumferential groove and tongue joint ensures closed board joins. The dry subfloor can be covered with all kinds of flooring without delay (ceramic tiles, natural stone, wooden parquet, laminate, PVC flooring, carpet, etc.). The handy format of the dry subfloor enables loose installation without any additional fastening material. Through the application of this composite element, two results are achieved in one step: thermal insulation and a solid, permanent floor that can be walked on and subjected to loads immediately. Also suited for DIY installation.

Test reports (PDF)