Put a timber depending where the warp is, let say at the bottom so put a timber at the bottom so the door cannot shut and make a hook at the top of the door and hook it to the other side of the frame and pull it in and lock it somehow. The old way we used to screw the 45 degree angle batten on the top corner of the door, don't forget you may get stuck in the room for the next 24 hrs
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