Permanent Wood Foundation Lumber Vs Pressure Treated

Of permanent wood foundations.

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. 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. Of chemical per cubic foot of wood so that the chemical penetrates deep into the core of the wood. A permanent wood foundation must have the right mix of chemicals to ensure it never rots or is eaten by termites.

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. A pwf system consists of load bearing wall systems framed with pressure treated lumber and sheathed with pressure treated plywood. Permanent wood foundations consist of load bearing walls framed with pressure treated lumber and sheathed with pressure treated apa trade.

But wood foundations may not last as long as a concrete or concrete block foundation.