If your door is badly warped wet your heavy towels or large blankets and lay them across the warped area only.
How to strighten a warpped barn door.
Now keep your wrapped wood on a flat surface that also will be able to bear the temperature of your iron.
Set your iron to the highest temperature and let it heat properly for about 2 6 minutes.
For a slightly bowed door take a heavy weight and lay.
Leave the sandbag on the door for 24 hours or until the warp is completely gone.
Here in california it usually takes 20 minutes to 30 minutes in full sun.
I would replace the door because that s the easiest solution but if you have more patience than i do here are tips for flattening a warped door.
Remove the door from the jamb by unscrewing the hinges on the jamb side.
Cut lengths of 2x4 and place them across the door along the bowed edges to pin the door between the strips and the flat work surface.
You don t need to replace them.
Sanding is the next.
The amount of time it takes to remove the warp depends on how hot the sun is and how badly the door is warped.
First wet the concave side with water from a spray bottle.
Wrap your warped wood in two large moist towels and make sure the warped parts are properly covered.
If the door goes too far and warps the other way just turn it over and warp it back.
Remove the door sand and seal it with primer or polyurethane on the top and bottom edges.
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.
Each day rewet the towels and add five to 10 pounds of weight onto the door until is is completely straight again.
When the door is flat take it back inside and rehang it.
Place the door across two.
Warped doors are a fact of life in most older homes.
Fit these rods and you can introduce tension at the back of the door in eit.
The concave part needs to face downwards.
Choose an area within a few inches of the corner where there s solid thick wood.
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.
If the door is pine it s even more likely to warp.
Then clamp the door flat.
Do you have some wardrobe doors that are bowing.