Acoustics

Granab subfloor systems dampen both impact sound and airborne sound effectively. This prevents noise disturbances from neighbours. In addition, the floors do not creak, which they can do in other types of joisted floors. The sound insulation and stability have been tested by the SP Technical Research Institute of Sweden and SINTEF Byggforsk in Norway, and the entire subfloor system is type-approved by SP.

The test results from SP mean that the planner can determine the type of sound insulation that should be installed in a building. Field measurements in finished buildings confirm that most building structures with Granab floors installed will comply with sound class B, and in some cases even sound class A.