Backroom
The space behind a garage door when it is fully open. It determines whether a standard lift setup will fit.
Resources
Garage Door Glossary
Your guide to garage door terminology. Learn the names of common parts, how they work, and when a problem needs professional attention.
Know your door
A simple guide for homeowners
Garage door terms can sound technical, but understanding the basics helps you describe a problem clearly and make safer decisions.
- 1Find the term you heard or saw.
- 2Learn what the part does.
- 3Call when the repair is unsafe or unclear.
Showing 16 of 16 terms
B
Balance
A properly balanced door stays in place when lifted by hand and does not put extra strain on the opener.
Bottom bracket
The reinforced hardware at the bottom corners of a door section where the lift cable and roller are attached.
C
Cable drum
The grooved wheel at the top of the door that winds and unwinds the lift cable as the door moves.
Cycle life
The approximate number of open-and-close cycles a spring or other component is designed to handle.
E
Extension spring
A spring that stretches along the horizontal track to help lift the door. It should have a safety cable running through it.
P
Photo-eye sensor
The pair of small sensors near the floor that stop the door from closing when something crosses the opening.
R
Roller
The small wheel that rides inside the track. Worn rollers are a common source of noise and rough movement.
S
Sectional door
The most common residential door style, made of horizontal panels connected by hinges.
T
Torsion spring
A tightly wound spring mounted above the door that stores energy and counterbalances its weight.
Track
The vertical and horizontal steel channel that guides the rollers and controls the door's path.
Travel limit
An opener setting that tells the motor where the door should stop when opening and closing.
D
Drive gear
An internal opener component that transfers the motor's power to the chain, belt or screw drive.
O
Off-track
A condition where one or more rollers have left the track, leaving the door uneven or unsupported.
L
Lift cable
The cable attached to the bottom bracket that transfers spring tension to lift the door. Frayed cables need prompt attention.
W
Wind-load door
A door built with extra reinforcement to resist pressure from high winds and severe weather.
Need Context?
See these terms in action on our service pages
If a term describes what your door is doing, our service pages explain the likely causes and next steps.
Still Unsure?
Describe the Symptom, Not the Part
You do not need to know the right terminology before you call. Tell us what the door is doing and we will help you identify the next step.
Peace of Mind. Every Time.