Measure the inside dimensions of the garage door jamb horizontally across the top and vertically along both sides.
How to cut garage door trim.
Measure for the brick molding the trim that will face the street starting with the top piece.
Then measure the length of the moulding from the inside point of the miter you just cut to the desired length.
Step 1 remove old trim.
Make a mark before you cut another 45 degree miter with the power miter.
If you currently have trim around your garage door you will need to remove it before installing the new trim.
Cut the first miter on the head moulding piece.
Set the power miter to a 45 degree angle.
Nail the head moulding piece to the door jamb with trim nails.
How to trim a garage door opening 1.
Step 2 cut your trim to size.
Step 3 position the weather stripping and trim above the garage.
How to install trim around a garage door opening.
Use an angle gauge to.