FPSFFree Press Summer Festival
FPSFFrost-Protected Shallow Foundations (construction)
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FROST-PROTECTED SHALLOW FOUNDATIONS, or FPSFs, provide protection against frost damage without the need for excavating below the frost line.
The new version of the guide features updated graphics and detailed drawings of the prescribed methods of using FPSFs in constructing slab-on-grade foundations in cold climates with seasonal ground freezing.
While FPSFs have a proven track record (Scandinavian builders have used them for decades), code officials have been skeptical.
Their formula: Figure that a full foundation uses seven yards more concrete than a FPSF, resulting in 43 percent savings on your cost of concrete.