Measuring a Garage Door
Step 1: Measure the width of the opening.
Find the widest point to measure
This is the distance between the right and left sides of the finished opening.
For best results, the inside of the garage door opening should be framed with 2" x 6" wood.
Look for irregularities: jambs which are not perfectly square.
Step 2: Measure the height of the opening.
Find the highest point.
This is the distance between the floor and the top of the finished opening.
Look for irregularities. Example, floors that are not levelled.
Step 3: Measure the width of the areas beside the openings.
Up to 5" is required on each side for installation of the vertical track.
If this is a 2-door installation, center post should be a min. of 10" wide.
Step 4: Measure the area between the top of the door opening and the ceiling (or to the lowest obstruction at ceiling).
See headroom requirements on the "Choose Your Track And Spring Options" page when getting a sectional door quoted on-line. See the manufacturer's brochure for required clearances on coiling roll-up doors.
Step 5: Measure the distance from the opening to the rear of the garage or nearest obstruction.
For sectional type doors, the backroom requirement is the door height plus an additional 18" for manual lift doors.
If an electric opener is to be installed, the door's backroom requirement is the door height plus an additional additional 4'2".