For the headroom you should have about 10 to 12 of space depending on the spring system you re installing.
How to hook up garage door to ceiling.
Insert rollers into the brackets attached to the door.
Screw cable brackets to the door to secure the weather stripping.
Set it securely on top of a stepladder so it s conveniently close to the ceiling.
Install the garage door opener.
Stand the bottom door panel on the floor in the garage doorway.
Attach the bracket the opener came with to the wall above the door and then insert the end of the assembly into it.
Measure attach hinges and handles measure the various areas where the door will be installed.
Lean the end of the assembly opposite the motor compartment up above the garage door.
Lift the power unit.
Follow the included instructions to hook up the opener and fasten it to the spring system with a pulley and cable.
Door opening height and width headroom from top of opening to ceiling and back room length of garage.
Connect the bracket and the end of the assembly as directed in the installation instructions.
Use impact driver to mount hinges to the bottom panel of garage door.
To install the opener you ll need to hang another angle iron from the center joist on your garage s ceiling.