When properly designed, wood frame structures will resist damage by moisture and living organisms. Recommendations for control of moisture and protection against decay and insect infestations are contained in AWC’s Design of Wood Frame Structures for Permanence, WCD No. 6. Protection of wood frame structures to provide maximum service-life involves four methods of control, which can be handled by proper design and construction: (1) control moisture content of wood, (2) provide effective termite controls, (3) use of durable materials such as naturally durable or preservative treated wood, and (4) quality assurance.

Learning Objectives

1. Understand conditions necessary for wood-destroying organisms to thrive.
2. Understand construction techniques that prevent moisture intrusion into wood-framed structure including code-required clearances, site drainage, and correct placement of moisture barriers.
3. Understand remedies for improper design and construction.
4. Be knowledgeable about preservative treated wood and naturally durable species, grading issues, and tips on preventing moisture-related insect and fungal attack.

Funding provided in part by the Softwood Lumber Board.