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Get the measure of your garage door space...

How to Measure...

When measuring the garage opening, always measure from more than one point as the brickwork may not be consistent. Always ensure there is sufficient internal clearance in the garage for the door to be installed and operate fully.

show / hide show / hideCanopy & Retractable Door Gear

Canopy lifting gear is available for single sized doors up to 2438mm (8'0") wide and 2134mm (7'0") high only.

Door frames may be fitted within or behind the brickwork. Fitting behind the brickwork, if the garage length allows, will increase the drive-through width by up to 114mm (41/2").

Where an Autoglide electric operator is to be specified together with a Quick-fit 54mm frame, the frame must be fitted behind the brickwork. This is not necessary with a 70x70mm timber frame or the optional 68mm steel frame.

Fitting within the opening:

Step 1 - Measuring the opening

  1. Measure the height within the opening
  2. Measure the width within the opening
  3. Ensure there is a minimum of 65mm headroom above the lower face of the top timber or lintel
  4. Ensure there is a minimum depth of 1282mm free from any obstructions for the door to travel back into the garage when in open position (top of garage)

Step 2 - Selecting a frame

Dependent on which frame is to be used subtract the following from the opening dimensions:

  1. 70mm Timber frame (not supplied with door) - subtract 146mm opening width/73mm opening height
  2. 54mm Quick-fit steel frame - subtract 114mm opening width/71mm opening height
  3. 68mm Quick-fit steel frame - subtract 142mm opening width/71mm opening height

These dimensions include a 3mm gap at all sides to allow for brickwork coursing and tolerances.
Example: Measure opening (width x height) = 2248mm x 2205mm - 114mm from width (for 54mm Quick-fit steel frame) = required door size of 2134mm x 2134mm (width x height). Now check minimum clearances.

Fitting behind the opening:

Measuring the opening

  1. Measure the height within the opening
  2. Measure the width within the opening and subtract 26mm to allow the frame to overlap into the aperture on both sides to allow for coursing and tolerances
  3. Ensure there is a minimum of 65mm headroom above the lower face of the top timber or lintel
  4. Ensure there is a minimum depth of 1282mm� free from any obstructions for the door to travel back into the garage when in open position

These dimensions include a 3mm gap at all sides to allow for brickwork coursing and tolerances.
Example: Measure opening (width x height) = 2160mm x 2205mm - 26mm from width (for 54mm Quick-fit steel frame) = required door size of 2134mm x 2134mm (width x height). Now check minimum clearances.

For retractable door gear follow the above steps and ensure there is a minimum depth of 1877mm free from any obstructions for the door to travel back into the garage when in open position.

show / hide show / hideSide Hinged Doors

Step 1 - Measuring the opening

  1. Measure the height within the opening
  2. Measure the width within the opening

Step 2 - Selecting a frame
Dependent on which frame is to be used subtract the following from the opening dimensions:

  1. 70mm Timber frame (not supplied with door) - subtract 146mm opening width/73mm opening height
  2. 65mm Quick-fit steel frame - subtract: 136mm opening width/71mm opening height

These dimensions include a 3mm gap at all sides to allow for brickwork coursing and tolerances.
Example: Measure opening (width x height) = 2270mm x 2205mm - 146mm from width (for 65mm Quick-fit steel frame) = required door size of 2134mm x 2134mm (width x height)

show / hide show / hideSteel Roller Doors

Step 1 - Measuring the opening

  1. Measure the height within the opening
  2. Measure the width within the opening
    1. For widths up to 3400mm add 50mm
    2. For widths over 3400mm add 100mm
    3. For all doors supplied with Rollguard add 70mm

Step 2 - Clearances Required
Side Clearances

Door Width Up To: Manual Door Automated Door (Operator side only)
Doors without Rollguard 100mm 125mm
Doors with Rollguard 150mm 150mm

Headroom Clearances

Door Height Up To: Minimum Headroom
2134mm* 380mm*
2438mm 405mm
2743mm 430mm
3048mm 455mm
*330mm with Mini Roller  

The clearance must extend back into the garage by 500mm for all door heights.

Example: Measure opening (width x height) = 2115mm x 2134mm + 70mm to width (for Rollguard) = required door size of 2185mm x 2134mm (width x height). Now check minimum clearances.

show / hide show / hideInsulated Roller Doors

Step 1 - Measuring the opening

  1. Measure the height within the opening
  2. Measure the width within the opening

Step 2 - Clearances Required

Side Clearances

The below dimensions are required only if the guides are to be fully concealed:

70mm For door sizes up to 9sqm
95mm For door sizes over 9sqm and guide heights above 2500mm
66mm For all Thermaglide and Henderson 55 doors
40mm Minimum required to give sufficient room for fixing, a portion of the guide tracks will be visible

Headroom Clearances

270mm For door sizes up to 9sqm
300mm For door sizes over 9sqm, over 2500mm guide height and any door with a roll box option
205mm For all Thermaglide and Henderson 55 doors

When fitting within the aperture a 300mm depth will be required.

Example: Measure opening (width x height) = 2134mm x 2134mm = required door size of 2134mm x 2134mm (width x height). Now check minimum clearances, 70mm Side clearance and 270mm Headroom clearance.

show / hide show / hideSectional

Sectional garage doors can be fitted either to a good quality timber frame or direct to sound brickwork and can be fitted within or behind the brickwork opening. If fitted within the brickwork opening, the door must be fitted to a timber frame or frame kit.

Step 1 - Measuring the opening

To fit the door behind the brickwork opening:

  1. Measure the height within the opening
  2. Measure the width within the opening
  3. Ensure you have adequate sideroom, headroom and clear space (depth) into the garage - see the below table for details

To fit the door to a timber frame within the brickwork opening:

  1. Measure the height within the opening
  2. Measure the width within the frame opening
  3. Subtract the required side and headroom (as shown below)

Step 2 - Clearances Required

Operating Gear Sideroom (mm) Headroom (MM) Depth into garage (mm)
Manual Automatic Manual* Automatic*
Tension 80 150 150 opening height (B) + 700mm B < 2250 = 3350
B > 2375 = 4450
Tension (low headroom) 120 100 120 opening height (B) + 750mm B < 2250 = 3350
B > 2375 = 4450
Torsion front 80 200 200 opening height (B) + 700mm B < 2250 = 3350
B > 2375 = 4450
Torsion rear (low headroom) 80 100 120 opening height (B) + 800mm B < 2250 = 3350
B > 2375 = 4450

Example: Measure opening (width x height) = 2134mm x 2134mm = required door size of 2134mm x 2134mm (width x height). Now check clearances for operating gear, so if using manual tension ensure 80mm sideroom, 150mm headroom and 9134mm depth (height + 700mm) are available.

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