Help
Detailed guidance on surface resistance calculation and the calculator fields is available in the surface resistance help.
EN ISO 6946
Surface resistance calculator
Determine internal and external surface thermal resistance for building elements using calculation methods in accordance with EN ISO 6946.
Calculate surface thermal resistance
Enter the required boundary conditions in the calculator below.
The calculator works in modern browsers and on mobile platforms. If the application does not load correctly, refresh the page or restart the browser. The previous Silverlight version is also available.
U-value calculator
Use the related U-value calculator for walls, floors, roofs and constructions adjacent to the ground.
Calculation examples
See the calculation examples if you need help with specific constructions.