Permanent Wood Foundation Lumber Vs Pressure Treated

Permanent wood foundations consist of load bearing walls framed with pressure treated lumber and sheathed with pressure treated apa trade.

Permanent wood foundation lumber vs pressure treated.

When pressure treated wood was developed in the 1960s it became possible for wood to be used in foundation walls without being prohibitively vulnerable to damage from insects. A pwf consists of a stud wall and footing substructure constructed of approved preservative treated plywood and lumber which supports an above grade superstructure. Of chemical per cubic foot of wood so that the chemical penetrates deep into the core of the wood. Foundation grade wood used in foundations is treated by steam impregnating it with a chemical called cca chromated copper arsenate at a concentration of at least 6 lbs.

The permanent wood foundation pwf is an innovative building system that saves builders time and creates comfortable living areas that enhance a home s value. But wood foundations may not last as long as a concrete or concrete block foundation. A permanent wood foundation pwf is an engineered construction system that uses load bearing exterior light frame wood walls in a below grade application. And it provides builders and architects with detailed construction tips for a variety of building styles including both crawl space and full basement foundations.

While traditional basement walls are made from masonry materials such as concrete or stone inspectors should be prepared to encounter permanent wood foundations pwfs.