If you’re thinking about buying a roller garage door for the first time, the technical terminology may feel overwhelming. Whether you’re a homeowner or own a business that needs a new garage door, it’s important to understand the key components before you make a purchase.
At Rollerdor, we’ve put together this comprehensive guide to help you properly understand some common industry terms that you may be unfamiliar with.
Core roller garage door components
Curtain
The curtain is the main body of the roller garage door. It is made up of slats that roll up and down when in operation. Our slats are made from robust aluminium that provides excellent durability and is built to last.
Guide runners
These components are fitted on either side of the garage door opening. The curtain runs through these runners, or rails as they are sometimes referred to as, helping the door open and close in a smooth, controlled manner.
Barrel
Located at the top of the door, the barrel is a tube that the curtain wraps around when the door opens.
Head plates
These are mounted on either side of the garage opening and support the barrel. They secure the entire structure of the roller garage door.
Movement mechanisms
Rollers
The rollers help guide the curtain up and down as the door opens and closes.
Motor
Most roller garage doors are operated electrically. The motor is fitted to the barrel, and it powers the door as it opens and closes.
Safety features
Base rail
This is the bottom slat of the curtain. It is often reinforced for extra strength and will feature a weatherproofing rubber seal to stop draughts and debris.
Safety edge
These detect obstacles when the garage door is closing. If something is in the way, the door will reverse to prevent damage or injury.
Locking straps
These straps secure the curtain to the barrel.
End lock
These locks are fastened to the slats to stop the curtain from sliding around.
Auto-lock system
Many roller garage doors lock automatically when closed to keep them safe and secure without the need for manual locking.
Manual override
The manual override is used in the event of a power failure. It allows the door to be opened by hand, so access is never restricted.
Other terms
Some other terms you may hear include:
Headroom
This is the space required above the garage opening to accommodate the garage door.
Insulated slats
Double-skinned slats are filled with insulating foam that improves thermal efficiency.
Remote control fob
A handheld device that opens and closes your roller garage door.
Understanding the jargon around roller garage doors will help you make a more informed buying decision. Each component plays a crucial role in durability, security and performance. You can also check out our installation guide for full explanations on how to install your roller garage door. For more information or to place an order, get in touch with our friendly team of experts today.

