PWFs and FPSFs are a code-permitted ways to design and build foundations that are alternatives to concrete foundations. PWFs can be built by a framing crew and are fast to erect. FPSFs can be built from concrete or wood and are more cost-effective than conventional frost-depth foundations. They can be used on challenging lots or where regular basement foundations aren't practical.

Learn what the codes are for PWFs and FPSFs and technical documents that fill in the blanks.