The moisture content of the wood you build with is important to consider, as if it's too wet, the lumber will warp and cup, and if it's too dry, the lumber will shrink, split, and crack. Lumber should have a moisture content between 6-14%, although there are some special cases in which lumber with a higher or lower moisture content may be used. For example, green lumber (lumber that has been recently cut down and not yet dried) typically has a higher moisture content than kiln-dried lumber.

The moisture content of the wood you build with can vary, but it's usually around 10-15%. That's because most lumber is kiln-dried after it's processed, which reduces the moisture content to a safe level for home building. If you're building with green wood (wood that hasn't been dried), then the moisture content will be much higher, often in the range of 25-35%. And if you're building with reclaimed wood, then the moisture content could be anywhere from 50% to 100%. So it's important to know the moisture content of your wood before you start construction, because if the wood is too wet, it could cause problems like warping, cracking, and mold.