Drafts around the exterior door.
Garage door frame rotted.
The main cause of rotted garage doors is water damage.
How to use epoxy on wood for repairs.
With time the wood frames and bottom starts rotting and breaking down.
Pry on the crowbar to lift the trim and loosen it.
To repair rotted door frame first remove rotted wood with a 5 in 1 or other sharp tool.
Tap on the back of it with a hammer to drive the tip in as far as you can.
Usually mold or wood rot is easily recognizable by the telltale dark soggy patches that form around the door frame.
Mix polyester wood filler or bondo wood filler and press it into the recess with a putty knife.
In case you have had a plumbing accident water in your garage will move to your garage door.
These dark spots are caused by the growth of fungi as they feed on moist wood.
Some garage doors are.
Then coat the rotted door frame area with wood hardener as shown.