DIY Frequently Asked Questions / Garage Door')">
Hinged panels allow overhead garage doors to roll up and down with ball-bearing rollers and a rope pulley on a steel track.
Some panels have a polystyrene and/or air space between panels to insulate and deaden sound.
Some doors feature steel frame construction and a wood-grain raised-panel design, while others combine hardboard panels with a wood frame.
Comes with extension springs to help the door lift and balance, as well as safety containment cables to guard against injury.
Vinyl or aluminum bottom weatherseal counteracts uneven garage floors and protects against weather intrusion.