Garage Door Sizes

Garage Door Sizes

Measuring for a New Garage Door

The following page provides a general introduction to measuring for a new garage door. If you are looking to measure for a specific door type then take a look at our tailored and detailed measuring guides for each door type:

General Measuring Advice

Measuring for a new or replacement garage door can be a challenge, with different door types sometimes requiring different measurements. This guide page is designed to give you a general overview of how to measure for a new door. More specific information for each door type is given in the links provided above.

Firstly, the most important measurements in most instances are:

The width and height of the structural brickwork opening
The internal headroom
The internal reveals

Headroom is defined as the space between the underside of the lintel and the lowest point of the ceiling. Reveals are the faces on either side of the opening, for which the width needs to be measured. For replacement doors, these measurements may change if you are reusing existing framework or door panels.

Also, please note any obstructions to the opening, like gas or electric meters and internal doors. This may affect the types of door that your garage can facilitate. With these measurements and information, our team can create a much more accurate picture of what you need!

Up and Over Garage Doors

Up and Over garage door measurements depend on whether the door is being fitted inbetween or behind the opening, and whether an existing sub-frame is being used.

This door type always requires a fixing sub frame for installation. In the UK, these doors are ordered by their internal frame dimensions, which is the width and height of the sub frame opening. Therefore, take these extra dimensions into account if ordering for a new sub frame.

You should just concern yourself with the overall door and sub frame measurements, since frames vary slightly from one manufacturer to another.

Up and Over Full Measuring Guide >

Sectional Garage Doors

Sectional Overhead Garage Doors

Sectional Doors are ordered by the opening dimensions as the doors are all fitted with a steel framework that installs directly to the brickwork.

These doors are usually installed behind the opening (inside the garage), which maximises the width for vehicle access etc. These doors require a large amount of space for the horizontal arms as the door opens upwards and then back into the headroom (often the height of the door, plus at least 350mm).

Since these doors are usually installed behind the opening, it can be possible to install a smaller or larger door than the opening dimensions.

Most sectional garage doors are ordered in either imperial or metric measurements, although quite often the imperial measurement is not quite the actual size of the door (but a near-order reference size).

Sectional Door Full Measuring Guide >

Roller Garage DOors

Roller Shutter Garage Doors

Roller Shutter Doors are ordered by the different dimension references depending on the manufacturer. Some use structural opening sizes, whilst others use curtain width. Since most roller doors are made to order, please take extra care when placing an order.

Generally, it is best to install the tracks and supports for a roller door behind the opening as this maximises the width for vehicle access etc, but also gives the curtain roll sufficient space within the headroom. Modern, insulated roller shutters do not require a sub frame as the tracks fit directly to the garage structure. Insulated roller doors can fit inbetween a structural opening, whereas non-insulated continuous-curtain steel roller doors must fit behind a structure as the track guides are very different in construction and not designed to be seen externally.

Most roller door manufacturers now produce doors to exact sizes and you only ever tend to see standard sizes shown in special offers

Here's a quick overview of Roller Door ordering dimensions.

Ordered with Overall Width including side guides and Guide Height without roll and endplates:

SeceuroGlide - Standard Electric, Manual and Compact
SeceuroGlide LT
Gliderol Roll-A-Glide
NovoRol
Samson SupaRolla

Ordered by Opening Width and Guide Height without the roll and full hood:

Hormann Rollmatic
Garador GaraRoll

Ordered by Opening Width plus curtain overlap (more width is required for installation due to fixing lugs), and Guide Height without the roll size.

Gliderol Continuous Curtain Steel Roller Door (Series A and AA)

Roller Door Full Measuring Guide >

Side Hinged Garage Doors

Side Hinged Garage Door Sizes

Side Hinged Doors are ordered using the internal frame opening size, akin to Up and Over doors.

Since Side Hinged Doors are conventionally installed between the opening, the most important dimensions are the of the overall door panel and frame size. Installing in front of the opening is possible, and requires some flashing and sealing to the frame head.

It is best to order Side Hinged Doors using the overall width and height measurements, including the frame dimensions. Please contact us if you are unsure about any of the required details.

Side hinged garage doors in timber are very versatile in out of square openings although timber framework is equally versatile enabling steel, GRP or timber side hinged doors to be installed. Basic measurements to take inside your garage before looking for a new garage door of any kind.

Side Hinged Doors Full Measuring Guide >

Basic garage door measurements

Dimensions and details for some up and over garage doors, sectional and roller garage doors.

Many of the most up to date size tables are available in the PDF downloads section in the main brochures or technical literature for the appropriate door type. Here are some of the most popular door size tables:

Take a look at our specific measuring guides for each door type: