Once you’ve completed your garage door opening measurements, the next step is reviewing the garage door specifications to determine which door type best suits your space. Whether you’re leaning toward a roller door, panel lift (sectional), or tilt door, each option demands specific installation conditions. By comparing these requirements with your measurements, you’ll ensure a precise fit and smooth operation.
Already picked your preferred door style? Great—there’s still room to adjust your opening dimensions to suit the design’s technical needs. This flexibility allows you to optimize both performance and visual impact.
To help guide your decision, the following sections outline detailed specifications for each garage door type. These include clearance requirements, headroom allowances, and structural compatibility—allowing you to make informed choices with confidence.
🔧 Ready to design your garage door from scratch? Explore our design guide and bring your vision to life.
👉Designing Your New Garage Door In Sydney: A Simple Guide
Garage Door Curtain Size vs Daylight Opening Measurement
Before diving into product selection, it’s important to understand the distinction between garage door curtain size and daylight opening measurements. While these two dimensions serve different purposes, they work together when determining the correct roller door configuration. Curtain size affects hardware selection, while daylight opening measurements influence fit and clearance.
When you understand how each measurement affects installation and compatibility, you can confidently choose a door that fits well, operates smoothly, and enhances your space.
✅ Your Garage Door Opening Measurement Data
Before reviewing garage door curtain sizes, ensure you’ve recorded the following:
- Width (W)
- Left Height & Right Height (LH, RH)
- Left Sideroom & Right Sideroom (LSR, RSR)
- Headroom (HR)
- Backroom (BR)
If you haven’t measured yet, start with our
Roller garage Door Size and Specification
Curtain Size Classification
The width of a roller garage door curtain plays a critical role in selecting the appropriate hardware and track system. Depending on the garage door curtain size, different configurations may be required to ensure smooth operation and proper fit.
Size A: Curtain width up to and including 3430mm, Uses standard brackets and tracks
Size AA: Curtain width greater than 3430mm, Requires heavy-duty brackets, wider tracks, and reinforced components for durability and stability
Motorized(Auto) vs Manual Roller Doors
If you’re installing a motorized roller garage door, be aware that sideroom requirements differ from manual models:
- Manual roller garage doors require standard sideroom clearance
- Motorized roller doors need additional space to accommodate the motor and drive system
Accurate measurements ensure your selected door fits seamlessly and operates safely—regardless of the configuration.
Roller Garage Door Specification Breakdown
Understanding the exact specifications for roller garage doors is essential for accurate planning and installation. Below is a detailed breakdown of curtain dimensions, sideroom, and headroom requirements for both Size A and Size AA roller doors—with and without motors.
🔹 Serial A Roller Garage Door
| Configuration | Curtain Width | Curtain Height | Sideroom | Headroom | Backroom |
| Manual (No Motor) | Opening Width + 50mm | Opening Height | 90mm on each side | 470mm | 500mm |
| Motorized/Auto | Opening Width + 50mm | Opening Height | 140mm (motor side), 90mm (opposite side) | 470mm | 500mm |
🔹 Serial AA Roller Garage Door
| Configuration | Curtain Width | Curtain Height | Sideroom | Headroom | Backroom |
| Manual (No Motor) | Opening Width + 100mm | Opening Height | 125mm on each side | 470mm | 500mm |
| Motorized/Auto | Opening Width + 100mm | Opening Height | 150mm (motor side), 125mm (opposite side) | 470mm | 500mm |
These specifications help ensure your roller garage door fits properly and operates smoothly—whether you’re installing a standard manual door or upgrading to a motorized system.
📞 Need help choosing the right configuration? Contact us for a free quote.
Panel Lift Door Sizes & Specifications
Panel lift doors, also known as sectional garage doors, require specific measurements and track configurations based on available headroom. Choosing the right track system ensures garage door’s smooth operation and proper fit.
Headroom Classification & Track Options
Depending on your ceiling clearance, panel lift garage doors can be installed using one of the following track systems:
| Track Type | Manual Operation Headroom | Motorized Operation Headroom |
| Standard Tracks | 320mm | 350mm |
| Low Headroom Double Tracks | 200mm | 250mm |
| Low Headroom Super Closer | 160mm | 160mm |
These options allow flexibility for garages with limited ceiling clearance or structural constraints.
Additional Panel Lift garage Door Specifications
- Curtain Width: Opening Width + 60mm
- Curtain Height: Opening Height + 20mm
- Standard Sideroom: 120mm on each side
- Backroom Requirement:
- Manual Doors: Door Height + 300mm
- Motorized Doors: 3600mm
This specification guide helps ensure your sectional garage door is properly sized and installed for optimal performance.
📞Ready to get started? Contact us for a free quote.
Tilt Door Fitting Types & Specifications
Tilt garage doors are categorized by the arm mechanism used: J-Fitting (Jamb-mounted) or T-Fitting (Track-mounted). The choice between “J” and “T” hardware depends primarily on the door’s weight and height, ensuring safe and efficient operation.
Each fitting type has specific specification to the door dimensions and clearance space to accommodate the hardware and allow smooth movement.
Fitting Classification & Specification
| Specification | J-Fitting | T-Fitting |
| Door Width | Opening Width − 24mm | Opening Width − 20mm |
| Door Height | Opening Height − 24mm | Opening Height − 27mm |
| Headroom | 50mm (Manual) / 100mm (Auto) | 50mm (Manual) / 100mm (Auto) |
| Sideroom | 50mm | 90mm |
These garage door size and specification ensure proper clearance and smooth operation for both manual and motorized tilt doors.
What’s the Next
Now that you’ve measured your garage door opening, explore the next steps in your garage door journey:
- Garage Door opening measurment – Understand sizing, materials, and performance features
- Garage Door Design Options – Choose styles that match your home’s architecture
- Garage Door Installation Services – Learn about professional installation and setup
- Garage Door Maintenance & Repairs – Keep your door operating safely and smoothly
Each link helps you make informed decisions and ensures your garage door is functional, stylish, and built to last.
Find Your Perfect Garage Door in Sydney
Finding the right garage door is simple when you know what to look for. Whether you prioritize style, space, or security, Aussie Garage Doors delivers tailored solutions designed to suit every Sydney home.
🔍 Ready to explore your options? Discover our full range of garage doors and get expert advice today.