I bought some 1" re-sawn VGF from my local supplier last month. It had just been re-sawn from 8/4 by their supplier. I stickered the lumber in my shop for a month, today I started breaking the 12 footers down to size and noticed the cupping. The dry face (original 8/4 outside face) is convex and the re-sawn face is concave. I took numerous moisture readings and there's a 3-4% moisture difference in the 2 faces. I'm guessing the cupping is from the moisture imbalance. I can joint the concave face flat but it's still 3-4% wetter than the outside face and I'm concerned that it will just re-cup. The boards are for oversize 6' tall 20" wide raised panel cabinet doors and I suspect the problem will cause the doors to go out of flat as the lumber reaches moisture equilibrium. I'm calling my supplier tomorrow, seems to me he should be responsible for selling me poorly processed lumber.