Most standard garage doors with extension springs require a minimum of 10 inches of headroom.
Sectional garage door ceiling clearance.
12 5 8 15 3 4.
304 mm available it is best to use a dual track system designed for low headroom.
12 radius 12 required 15 radius 14 25 required.
Most common garage door track.
It allows the doors to run on a high and a lower track at the same time taking care of the low clearance problem.
Used for typical applications.
On the other hand if there is only 4 in.
121 mm to 12 in.
11 5 8 14 1 4 thru 16 0 o h.
When a garage door opens it rolls back on horizontal tracks.
The top of the door requires some room to make that turn.
There is a garage door accessory called a low clearance bracket kit or low headroom kit.
We have an older home 45 years plus and we replaced the one piece garage door with a garage door that breaks down in to 4 sections we used this with our low ceiling due to not have enough clearance.
Headroom clearance is the distance between the top of the door opening and the ceiling.