Being argumentative based on one's supposition rather than any actual knowledge of a subject is in poor form.
Stating that lumber is "kiln dried" says nothing until one states the lumber's purpose. Lumber dried for framing is dried to a much different moisture content than lumber dried for a cabinet maker.
Yes, 18% kiln dried lumber holds fasteners quite well, but not as well as that same fastener in green lumber after it dries. That is just a fact.
I assume you are replying to my post?
Anyone that thinks construction grade lumber is dried to the same level as wood used for cabinetry, needs to learn more about wood and its uses. Certainly true cabinet grade wood is dried more. But cabinet work was never part of the conversation.
If "
18% kiln dried lumber holds fasteners quite well..." then perhaps the green wood is only marginally better, so does this make any real difference in a practical sense?
How about a reference showing the difference in measured terms. I would like to learn more, rather than just relying on general beliefs, which could be actually true, or actually be not true at all, but believed.
We all know that wood shrinks when it dries, and expands as it gains moisture. Now, just to continue this thought, a screw in green wood actually is a non moving plug, except for size changes due to temperature changes.
Now as green wood dries and shrinks, if it is doing this around a non movable object, is there a chance that the wood will split at the screw, as it dries, along the axis in the direction of the grain? If so, this would end up giving less contact to the screw threads to some degree. Perhaps reduce pull out strength of the screw as well. AS compared to wood that would shrink less, being kiln dried.
I likely will never use a metal roof, so I don't really care, other than intellectual curiosity.
