Garage Door Repair Glossary

This glossary decodes the jargon Exeter homeowners hear when their garage door won’t open, squeaks in winter, or lets drafts in. Knowing these 14 key terms helps you spot wear early, choose the right services, and keep your older home’s brick-and-masonry garage safe and weatherproof year-round.

If your 1920s Exeter home still rolls on its original garage door hardware, you’ll run into terms like torsion springs and photo-eye sensors. We’ve put together a plain-English glossary so you can diagnose noises, drafts, or slow operation before calling a pro. Whether you’re in Brentwood, Stratham, or right here in Exeter, these terms will help you protect your masonry garage’s character and your family’s comfort. Contact us for a free estimate if any term sounds like your door’s problem.

Torsion spring

A tightly wound metal coil mounted above the garage door that counterbalances the door’s weight, letting you open it with one hand. When one breaks—often with a loud bang—your door may feel suddenly heavy or refuse to move. In older Exeter homes with brick garages, these springs are usually the original equipment and should be replaced by a licensed pro services to avoid injury or masonry damage from sudden imbalance.

Extension spring

Long, thin springs that stretch along the sides of the door track, pulling the door open and countering its weight. Unlike torsion springs, they’re visible and can snap without warning, leaving the door stuck shut. If your door jerks open or closes unevenly, check these first—especially in garages with older wooden doors or liners that flex over time.

Track

The metal rails—usually two vertical and one horizontal—that guide the door up and down. Bent or misaligned tracks cause grinding noises and can derail rollers, especially after winter ice shifts brick foundations. A pro can realign tracks without tearing into your brick masonry garage walls.

Roller

Small wheels that ride inside the track, carrying the door’s weight as it moves. Worn or cracked rollers make a rattling or screeching sound and can jump the track in cold weather. Replacing them is a quick services job that prevents bigger damage to your door’s edges and your garage’s brickwork.

Opener

The electric motor that lifts the door automatically; it’s mounted to the ceiling or wall and connects to the door via a chain, belt, or screw drive. If your opener hums but the door doesn’t budge, the issue could be the motor, the drive mechanism, or the limit switch. Older homes in Exeter often need upgraded openers to handle heavier, insulated doors.

Photo-eye sensor

Safety beams mounted near the bottom of the door that stop it from closing if something—or someone—is in the way. If your door reverses unexpectedly, the sensors may be dirty, misaligned, or out of sync. Cleaning or realigning them is a simple tips task that keeps kids and pets safe in Exeter homes with busy driveways.

Limit switch

A small control inside the opener that tells the motor when to stop opening or closing the door. If your door slams shut or won’t fully open, the limit switch may need adjustment. This is a quick fix for pros but can confuse homeowners who try to tweak it themselves and accidentally damage the opener’s [[travel module|#travel-module].

Weatherstripping

The rubber or vinyl seal along the sides and bottom of the door that blocks drafts, rain, and pests. Cracked or flattened weatherstripping lets cold air seep into your garage, raising heating bills and damaging older brick garages over time. Replacing it is a cost-effective pricing upgrade that preserves your home’s historic charm.

R-value (insulation)

A number that measures how well the garage door blocks heat transfer; higher R-values mean better insulation. For Exeter’s damp winters, an R-value of 10–12 is ideal for attached garages. If your door feels icy to the touch, adding an insulated liner or upgrading to a high-R door can cut energy waste and protect your brick masonry walls from condensation damage.

Cable drum

A grooved wheel at the top of the door that winds and unwinds the lift cables as the door opens or closes. If the cables fray or the drum cracks, the door can become unbalanced and crash shut. This is a critical safety component, especially in older Exeter garages where original hardware is still in use.

Bottom seal

The thick rubber strip attached to the bottom edge of the door that seals the gap between the door and the driveway. A worn bottom seal lets water, salt, and pests enter your garage, damaging both the door and your brick foundation. Replacing it is a straightforward services task that prevents costly repairs down the line.

Travel module

The electronic brain inside modern openers that controls speed, force, and safety features. If your opener behaves erratically—like stopping mid-cycle or reversing for no reason—the travel module may need reprogramming or replacement. This is a job for pros, especially in older Exeter homes with outdated wiring.

Trolley

The part of the opener that connects the motor to the door, pulling it along the track. If the trolley is loose or bent, the door may jerk or hesitate during operation. In brick garages, vibrations from an aging trolley can loosen mortar over time, so regular checks are wise.

Manual release

A red cord or handle inside the garage that disconnects the door from the opener, letting you open or close it by hand in a power outage. If your manual release is stuck or broken, you won’t be able to operate the door safely during an emergency. Test it twice a year—especially before Exeter’s storm season.

Insulated liner

A foam or polystyrene panel installed behind the door’s panels to boost insulation and reduce noise. Older brick garages in Exeter often lack this upgrade, leading to energy loss and condensation on masonry walls. Adding a liner is a cost-effective way to modernize your garage without replacing the door.

Brick masonry garage

A garage built with brick or stone walls, common in Exeter’s historic neighborhoods. These garages are beautiful but prone to drafts, moisture, and foundation shifts that can misalign garage doors. Regular maintenance—like repointing mortar and checking door hardware—keeps both the masonry and the door in top shape brick masonry.

Frequently Asked Questions