Airtight experimental housing at Heimdal. Tette forsokshus pa Heimdal.

The Heimdal project concludes that airtight houses can be built. Measurement results from 11 detached houses indicate an average leakage factor of 0.9. Building regulations in Norway require a value below 4 and NBI's field investigations indicate that there have been problems in complying with this requirement. The results from the trial houses have been achieved through the implementation of available methods but construction on site has been carefully planned and executed.