When building with ICF, what's the best way to build a thermal break on a concrete slab floor at the door threshold?
I am building a net zero home with ICF blocks serving as a frost wall. Our exterior above grade walls will also be ICF construction with the addition of 3.5" of EPS panels on the exterior. We will have a concrete slab floor.
What is the best method to support very heavy sliding doors and eliminate thermal bridging when building with ICF? I really like the Legalett Thermasill product, but it looks to have a proprietary design that only fits with their slab on grade system. Is there a similar product that can be used as a threshold to not only support the weight of the sliders but also be tough enough to act as a threshold on the exterior on the house?