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Backroom & Clearance Calculator
Check all three critical clearance dimensions for a garage door installation: headroom, sideroom, and backroom.
What is Backroom?
Backroom is the depth required inside the garage for the door to open fully. It's the distance from the garage door opening to the first obstruction in the back of the garage (like a wall or a large shelf). The required backroom is typically the height of the door plus about 18 inches for the curved track, and an additional 30-40 inches if you have a standard trolley-style opener.