Protecting wood products from moisture is an important factor in preventing fungal decay. Wood framing maintained at a moisture content of less than 20% will not decay.
A raised floor foundation separates a structure from one of the biggest sources of moisture — the ground itself. With proper design, construction, and maintenance practices, a raised floor system can remain dry and free of moisture-related problems.
Moisture management can be accomplished primarily through the application of basic, proven construction practices:
- Positive site and building drainage
- Proper crawlspace design and construction details to separate wood elements from known moisture sources, and to prevent condensation
- Use of pressure-treated wood where required or recommended
- Regular inspection and maintenance
For additional details, see the Design of Wood Structures for Permanence — Wood Construction Data No. 6 from the American Wood Council at www.awc.org.