Micro469 wrote:Miriam C. wrote::o I am having a slow night here. Is your stick framing warped? I am having trouble with the concept of 1/8" ply warping.... If it is just clamp it to the frame and wet it with really hot water. If it is the frame- - - start over!
I know that sounds hard but I have some warped framing that just never did go straight. I tossed it in the scrap pile. Remember this is the foundation for you walls. I don't think you can't rely on thin ply to pull it in/out.
I disagree Miriam. If you have ply on both sides, and glued and screwed together, and then mounted to the floor, it's not going to go anywhere.
Just because wood warps, doesn't mean you can't warp it back.....

I have to agree with micro469 on this one. I would be amazed if 1/8 inch ply WASN’T warped, and it’s not too surprising that the stick frame could have a few ideas of it’s own. Still, it shouldn’t require much force to bring it back into alignment, no? I wouldn’t get anything wet though. Since it doesn’t take too much force to get it back in alignment, it will straighten out as you build if you are careful.
First, make sure that you have a flat surface to work on, and I DON’T mean the garage floor, which is unlikely to be flat (did you build it on the garage floor?). Lay the stick frame down, slather the glue on it and glue and screw the plywood to it. It’s probably better to have at least 2 people doing that job. Put some weights on it and leave it overnight. I don’t know exactly about your construction, but I would then flip it over and glue in all of the rigid foam in, and by gluing I mean on all sides of the foam, not just the bottom of the pocket. Then I would trim the foam so that it was flush with the stick frame. Then I would, on the flat surface again to keep it true and flat, glue the other plywood facesheet to the foam and stick frame and glue and screw.
It will probably work without gluing the foam to all sides, and you probably don’t have to get the foam flush, but if you do it would be even stronger. The facesheets will now hold the stick frame true.
Also, as you put the roof on, galley wall attachment and other cross structure, it should help straighten everything out. Now, if you build the above composite panel on a warped surface it will be forever warped and you may or not be able to get it to come back in alignment; so, make sure you are working on the flat.
Of course you could take a couple of pictures so we don’t misunderstand and tell you something stupid. Is that basically how you are building your walls?