I finally figured out how to keep those big slab doors from warping
About three years ago, I built a set of kitchen cabinets for a client in Asheville, and the doors were made from 30 inch wide cherry slabs. Within six months, two of them had a serious cup to them, maybe a quarter inch at the worst spot. I was sure I had sealed them well, but it kept bugging me. Last month, I was talking to an old timer at a lumber yard and he asked one simple question: 'Did you seal the end grain on the back side of the door, too?' I hadn't. I only sealed the faces and edges you could see. He said moisture gets in and out mostly through the end grain on the back, and if it's not sealed, it dries unevenly and pulls the door out of shape. I tried it on a recent job, sealing every single surface before assembly, and so far, so good. Has anyone else had a door warp even when you thought you did everything right?