Re: Weird wood physics...

Posted by CLC on Aug 9, 2006

Even pavement has some moisture in it. So the side facing down is shaded and relatively damp, while the side facing up is baked by the sun. The damp side expands, and the hot side contracts as it dries out. You get a curve.

I use this trick all the time to straighten out warped but otherwise good lumber. On a hot day, putting the concave side down in the grass will straighten a board out in a half-hour. Actually, you have to watch it because it'll start warping the other direction if you leave it in the grass too long.

In Response to: Wierd wood physics... by JB on Aug 9, 2006