door thresholds for insulated slab on grade

Legalett has this pretty cool looking product:http://www.legalett.ca/thermasill-ph-insulated-door-thresholds-concrete-slab-on-grade-passive-house-zne.htmlUnfortunately, I don’t think I can justify the cost of their whole slab system, and they don’t sell the ThermaSill separately. Are there any similar… Legalett has this pretty cool looking product:http://www.legalett.ca/thermasill-ph-insulated-door-thresholds-concrete-slab-on-grade-passive-house-zne.htmlUnfortunately, I don’t think I can justify the cost of their whole slab system, and they don’t sell the ThermaSill separately. Are there any similar…Read MoreGreenBuildingAdvisor