SR202 In-situ measurement of thermal resistance for suspended timber floors (2018)

This report presents an overview of a procedure including measuring equipment that can be used to determine the in-situ thermal performance of suspended timber floor systems that make use of foil, bulk insulation or a combination of both.

Using the developed procedures and equipment, the project investigated the thermal performance of a suspended timber floor insulated with foil, including both when the foil was draped over the floor joists and when the foil was installed along the bottom of the joists as in a retrofit situation.

For the draped foil case, the aim was to measure the performance of a sample of foil that had been installed 15 years ago so that the effects of contamination and/or corrosion of the foil surface could be included in the measurement. The measurements were intended as a demonstration of the technique and equipment and should not be considered as necessarily representing typical performance.