Before painting wood, it is crucial to determine its moisture content, as excessive moisture can lead to paint peeling, cracking, and other issues. Moisture Mapping is a technique used to assess the moisture levels within wood to ensure optimal painting conditions.

Wood Moisture Content

Moisture content refers to the amount of moisture present in wood, expressed as a percentage of its dry weight. Wood absorbs moisture from the environment, and its moisture content varies depending on factors such as species, season, and storage conditions.

• Above 20%: Wood is considered wet and is not suitable for painting.
• 12-20%: Wood is deemed damp and should be allowed to dry before painting.
• 8-12%: Wood is in an ideal moisture range for painting.
• Below 8%: Wood is considered dry, which can also cause paint issues.

What Should the Moisture Content of Wood Be Before Painting?

The optimal moisture content for wood before painting is between 8-12%. At this range, the wood is stable and less likely to expand or contract significantly due to moisture changes. Painting wood with excessive moisture can trap moisture beneath the paint layer, leading to blistering and peeling. On the other hand, painting wood that is too dry can cause the paint to crack and chip.