Allow the door to remain on the sawhorses for at least 72 hours or longer.
How to fix a warped sliding door.
Two sawhorses screwdriver sandpaper heavy towels or a large blanket varnish paintbrush 50 lb sandbag or something of equal weight.
Let the door remain this way.
To me a warped frame means twisted.
Place as heavy objects on the warped side of the door until the warp is reversed as far as possible without damaging the door.
Basically you take a rivet buster chisel and die grinder and remove the track.
Remove the door sand and seal it with primer or polyurethane on the top and bottom edges.
You then use a die grinder burr to smooth the surface.
Place a pencil between the doorjamb and the door in the location of where the door is striking the doorjamb first.
Place the heavy objects at the center of the crown of the warp.
You have a few options for straightening out warped wood.
Straightening the track could be the most difficult.
In order to fix a twisted frame you ll need to 1 remove the track threshold 2 clean the track and where it s placed 3 straighten the track and 4 re secure the track to its correct position.
If the door has begun to straighten but is still slightly warped you will want to repeat the pencil in the door method.
There are replacement tracks has to match the old one that will now lay in the slot.
Determine where the crown the highest point of the warp is mark it and flip the wood over so that the crown is on the ground.
For a slightly bowed door take a heavy weight and lay.
What you need to fix a warped wooden door.
Once choice is to use moisture to reverse the effects of the warp.