If the door is pine it s even more likely to warp.
Keeping barn door from warping.
Do not adjust your door when the weather is about to change.
Warping barn door fix you could steel cable the proud corners diagonally together and use a turnbuckle over a 2x4 on edge to straighten it for a quick fix.
Don t adjust a door or frame in hot or cold weather it may reset itself when the weather becomes milder and undo your adjustment.
Taller doors are more susceptible to warping than shorter doors.
Warped doors are a fact of life in most older homes.
If that doesn t work with the existing doors to minimize the warp then we will start over and paint the design on them rather than have it built up with molding.
Tips to prevent exterior doors from warping tall doors are more prone to twisting so make sure they are well sealed.
Changes in temperature will increase the probability of.
Polish the door twice.
These additional tips will prevent your door from warping.
Tall doors must be made from hard wood such as oak.
Drill a small pilot hole for an eye screw in the top corner near the hinges and in the lower corner away from the hinges.
Sanding is the next.
Whether you are trying to restore a table with a warped top figure out why your cabinet or passageway doors are warped or you re a woodworker looking to fine tune your projects understanding.
Polishing your door at least twice a year can help keep the sealant in good condition.
Prop up one of the sagging doors to the height you want by tapping a block of wood under the end away from the hinges.
Unfortunately doors need to be structurally engineered for the most part unless you use really thick softwoods or hardwood and even then you need to screw and glue plywood or metal in a way to fight warppage.
Choose an area within a few inches of the corner where there s solid thick wood.
I think what we are going to do is cut the doors in half horizontally and then splice them together from behind so they will in essence be 2 doors each but acting as one when opening.
Place the door across two.
Remove the door from the jamb by unscrewing the hinges on the jamb side.
According to juan rodriguez there are a few more tips to follow to protect your door from warping.