Here’s a great summary from QuickSet outlining its practical formwork/insulation solutions that fit with the increased H1 requirements. This includes heated slabs. We’re proud to have helped with these developments, including the thermal modeling for their slab systems. The new QuickSet Ultra with base insulation makes this building scientist happy! Also worth noting: the QuickSet standard taper has also improved.
If you dig down far enough in the technical literature section you can find Sustainable Engineering’s reports. These contain R-values compliant for the new H1 standard for slab-on-grade as well as PSI and fRSI values for use in Passive House and Homestar V5 projects.