Measure the garage door opening
Gather the required tools and materials
Remove the old door if needed
Install the vertical tracks
Assemble the door sections
Attach hinges and rollers
Set the bottom section in place
Add the remaining sections one at a time
Secure the tracks and brackets
Install the torsion spring or extension spring system
Attach the cables and drums
Test the door balance and movement
Install the garage door opener if applicable
Tighten all hardware
Check alignment and safety features
Lubricate moving parts
Test the door several times