We want you to order the correct size sectional garage door for your garage opening. Please find below a complete guide and practical advice on how to measure up for any sectional garage door correctly.
Please note that at the point of ordering we will need to know the following (do not allow any tolerances, as we will do it for you):
- Brick to brick width of your garage opening
- Floor to underside of lintel height
- Headroom available above the lintel
- Sideroom available each side of the opening inside the garage
Points to keep in mind when measuring for a sectional garage door:
- The size of a sectional door is expressed as an internal frame size
- A fully finished steel frame comes with all sectional garage doors as standard
- The steel frame of a sectional garage door fits onto the rear of the brick pillars to maximize drive through width
- However, a between brickwork fit is possible if needs be – please call 01691 670394 for details
Please see below an easy to follow guide to the headroom and sideroom requirements based on the specifications from the following sectional door manufacturers: Hormann, Carteck, Henderson, Cedar Door, and Wessex.
Please note that some sectional garage doors require more headroom and sideroom than others.
We have expressed it as a table to make it easier to follow at a glance.
Sectional door type/size |
Headroom Required Manual door |
Headroom Required Automatic door |
Sideroom Required (each side) = door width plus |
Hormann up to and incl. 10′ 0″ wide |
Door height + 100mm |
Door height + 115mm |
90mm each side |
Hormann over 10′ 0″ wide |
Door height + 210mm |
Door height + 210mm |
90mm each side |
Hormann over 10′ 0″ wide on Low Headroom Gear |
Door height + 100mm |
Door height + 115mm |
90mm each side |
Carteck single and double width doors NB: DOORS OVER 16′ 0″ WIDE CALL FOR ADVICE |
Door height + 115mm |
Door height + 115mm |
90mm each side |
Henderson G60 up to 9′ 6″ wide |
Door height + 150mm |
Door height + 150mm |
90mm each side |
Henderson G60 over 9′ 6″ wide |
Door height + 200mm |
Door height + 200mm |
90mm each side |
Henderson over 9′ 6″ wide on Low Headroom Gear |
Door height + 100mm |
Door height + 120mm |
90mm each side |
Cedar Door Timber Sectional |
Door height + 200mm |
Door height + 200mm |
70mm each side |
Cedar Door on Low Headroom Gear |
Door height + 70mm |
Door height + 70mm |
70mm each side |
Wessex Vienna on Low Headroom Gear as Std. |
Door height + 110mm |
Door height + 110mm |
70mm each side |
We hope this measuring guide helped you. If you have any further questions we will be happy to give you further help and advice