A friend asked me to make him a sliding barn door for his shed, and he wants it to match the 1x8 PT on the barn now. I was able to find enough decent 1x8 x 8' PT at a Home Depot, but as usual they are very wet. I've had it stickered in my garage for a week now, and my moisture meter still pegs at 55% on a few pieces, but a few are down to around 20%. This will be a standard barn door, just a simple "Z" of wood stiffeners across the back to hold the shape, no edge treatments. I was gonna leave about 1/4" between each piece to match the shed siding. The wettest pieces are about 7-5/8" wide, but the driest ones are a little less than 7-3/8" wide.

So, my concern is if I build the door now (using screws), will the additional wood shrinkage cause the wetter pieces to split down the middle as they dry out?