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Our advice on sizes and on how to measure for an up and over garage door.

Are you purchasing a door to be fitted:

  1. To an existing brickwork aperture?
  2. To an opening which is being built to accommodate a standard size door?
  3. To a new opening which cannot be built to take a standard size door for good reason?
Please see the relevant explanations for 1, 2 and 3 below GENERAL SIZE ADVICE.

General Size Advice

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1. Purchasing a door to be fitted to an existing brickwork aperture.

If you are going to install the new door to an existing or new timber goalpost frame, the frame should be 70 mm x 70 mm in section. When measuring, please measure the internal timber frame size, not the actual door panel.
  • Garage door sizes are always stated as an internal frame size.
  • Garage door sizes are always expressed with the width first and height second. For example door size 7’0” x 6’6” indicates that the door is 7’0” wide and 6’6” high. The exact internal frame size for this door needs to be 7’0” x 6’6”. The actual door panel will be approximately 18 mm smaller in width and height to enable a perfect fit with the correct tolerance gap between the door and the frame.
If you are going to fit a new up and over door, with steel frame, to an existing brickwork opening please check your brickwork sizes with the size chart at the bottom of this page. These sizes apply to the most popular brands of door, Hormann, Garador Wessex and Woodrite (on super gear).
For a between brick fit the brickwork aperture should be 10mm wider and 5 to 10mm taller that the stated external frame sizes.
If the standard opening is bigger than this you can pack off and trim the gap with timber or UPVC if you so wish.
Steel or timber fixing frame fitted on the back of brickwork:
For a back of brickwork installation, the structural opening should be at least 10 mm wider and higher than the stated internal frame size of the new up and over door.
Please check there is sufficient side room and headroom on the back of the opening to accommodate the frame size and any kick-up of the door.

2. Purchasing a door to be fitted to a brickwork opening that is being built to accommodate a standard size door.

Decide whether you are going to fit the door and frame between the brick piers or on the back of the brick piers.
  • If fitting on the back of the brickwork ensure you have neat solid brick piers, not brick-block or brick-cavity-block. If the piers are block work that is to be rendered or cladded after installation, allow for the thickness of this to ensure the door will be able to open out through the aperture. Fitting on the back of the brickwork gives more entrance width and height. When viewed from the front you can show 5 mm to 50 mm of frame.
  • If fitting the door and frame between the brick piers and under the lintel the brickwork aperture should be built 10 mm wider and 10 mm higher than the chosen external frame size.

3. Purchasing a door to be fitted to a brickwork opening that cannot be built to accommodate a standard size door.

  • The Size Chart below shows internal and external frame sizes for all the standard size doors available from Hormann, Garador, Wessex and Woodrite (on supergear).
  • Made to measure doors are available at nominal extra cost.
  • Please send us your proposed sizes using our Self Survey Enquiry Form asking the specific questions you have or phone for unbiased help on 01691 670394.
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