Testing methodology

Testing methodology for completed floors

The SP Technical Research Institute of Sweden has developed a measurement method and device with digital deformation sensors for reliably and easily measuring the deflection of completed floors.

Please contact us at Granab for information about the measurement device and instructions for use.

Point-load deflection for Granab systems is in compliance with the applicable standards and recommendations. For the entire finished floor construction (including the floor covering) to attain the expected level of comfort – besides the choice of floor covering laid over the Granab system – it is important that both the Granab system and floor covering are  installed by trained installers and floor-layers, sovaldi and that the installation instructions and checklists are carefully followed.

Granab systems with 22-mm chipboard and both 15-mm or 22-mm parquet have been tested in a number of residential projects by the SP Technical Research Institute of Sweden with respect to deflection of the completed floors. The results show an average deflection within 2 mm of other measurement points in each flat with a point load of 1 kN.

Documentation from measurements conducted by the SP Technical Research Institute of Sweden with alternative floor coverings from a large number of field measurements in completed residential projects can be provided by Granab upon request, rx as well as figures from lab measurements conducted by the SP Technical Research Institute of Sweden and measurements from a large number of assembled test floors in Granab’s testing facility with alternative floor coverings.

All measurement results are within the margins for recommended values.

Sample test measurements and laboratory tests of deflection when point loads are applied. Deformation by force graph