What Causes Truss Uplift?

Wood moves. Drywall does not move. Interesting problem. The more you attach drywall to wood, the more cracks you have. Easy, attach the drywall to less wood, and, in a way, that allows the wood to move. Nail pops happen because as wood dries, it shrinks. Nails do not shrink. Actually, nails do not pop. The wood shrinks away from the back face of the drywall as it dries. How about getting dry wood? Sure. Next question. Better to use shorter nails. Even better, use glue. With glue, as the wood shrinks, it pulls the drywall inwards with it. But, you can’t only use glue, you’ve got to use something until the glue begins to work. Now, shorter nails don’t hold very well, and we don’t want to use more of them, so use shorter screws and glue.