Fit the new piece of panel into the hole and use caulk and finish nails to attach the quarter round back around the interior of the panel to secure it in place.
Repair rotted garage door bottom panel.
Instead of replacing a garage door panel that has been dented you can patch the area using auto body filler.
Fill the void with the filler.
I used a sheet of exterior grade plywood to cut new panels and wedge them into the grooved opening where the old panel sat.
After the filler hardens sand it smooth with the surface.
Mix up two part automotive filler.
Inspecting the garage door for rot signs is very important.
Even without damage dampness is enough to cause wood rot.
Then coat the rotted door frame area with wood hardener as shown.
Paint and prime the new piece of panel.
To repair rotted door frame first remove rotted wood with a 5 in 1 or other sharp tool.
Wooden door dent repair.
Inspect the garage door for wood rot.
Watch this video to find out more.
Caulk around the exterior side of the panel for added protection.
Sand down the area of damage and apply a layer of prepared auto body filler to fill in the dent and any voids on the door s surface.
As the filler starts to cure shape it to conform to the molding.
The 2 bottom panels are the most common to get damaged.
Mix polyester wood filler or bondo wood filler and press it into the recess with a putty knife.
I used 18 gauge brad nails to pin them in place.
You need to identify the specific parts of the door that are deteriorating.
With the new panels in place i then applied a bead of glue to the pieces of round molding.
The most susceptible areas to wood rot are the frames and bottom parts of the garage door.
How to use epoxy on wood for repairs.
You might get away with using ordinary ply if you already have it or want to save money but virtually any flat plank or ply should do the job as you say you screw it into the bottom rail from the inside of the garage making sure it overlaps the ply panel above by a few inches.