it may not be the best choice for making a headboard, since it can take up to 6 months for it to dry out when left in the open, probably much more inside. This is a large conglomerate. i've had to research the different treatments used to treat lumber in regards to their effect on fasteners.
Kiln Drying Lumber Part 1, Introduction
Unless you use one of the (very few) deck sealers that are specifically labelled. they kiln dry lumber to avoid all the problems with bending, checking, twisting, mold, etc. So why does it matter what the moisture content (mc) of a stack of 2x4s. Do not put sealant or paint or anything else on the wood if it is wet!
