For a wood foundation to perform properly, it needs to stay dry or be given the chance to dry if it gets wet. While they help give your basement a warm and cozy feel, it is a challenge for wood foundations in the land of 10,000 lakes and swamps to stay dry. A wood foundation should be built with treated lumber to resist rot and should also have water proofing barriers tied into drainage systems to keep water away from the foundation. Over time, drainage systems get plugged and barriers wear out.
Even though the wood used in the foundation is treated and may not rot for a long time, the moisture transfer through the foundation accumulates in the wall cavity, wetting the insulation and other interior wall items. This can cause unhealthy conditions in the home.
If the wood is wet, the water management system has failed. If you’re buying a home with a wood foundation, make sure to have a moisture test performed on the foundation walls.