A host of options are available through most manufacturers. For starters, you can order window sections for a decorative accent and to add daylight to a dark garage. Windows may be standard single glazing or, for insulated doors, dual glazed. Some doors have snap-in decorative frames.

Torsion springs are another option for sectional doors. Though tilt-up doors utilize extension springs—the type that stretch and recoil—torsion springs—a shaft spring and drum assembly—are much better for sectional doors.

Torsion springs distribute the door's weight more evenly and cannot break and fly off the way an extension spring can. Extension springs are cheaper, but most dealers prefer to install the safer and better torsion springs.

Perhaps one of the most appealing options of all is the automatic operator. Today's operators have rugged motors with lifetime warranties and several other features:

* Photoelectric safety devices that will stop the closing door and reverse it to open position if an invisible light beam is broken by your car or—worse—by a child.

* Miniature transmitters that fit on a key chain.

* Transmitters that operate only with a personal code you program into them.

* Multi-button remote controls that will operate appliances and lights in addition to the electric opener.