Frost Protected Shallow Foundation Cost Savings?

I’m building a home with a slab on grade foundation and am wondering how much a FPSF would save me in terms of building costs? We’ll be at 9,000 feet… I’m building a home with a slab on grade foundation and am wondering how much a FPSF would save me in terms of building costs? We’ll be at 9,000 feet…Read MoreGreenBuildingAdvisor