How to measure your garage door

When you order a garage door from us, you’ll need to know a few mea­sure­ments so that we’re able to give you a quote which is as accu­rate as pos­si­ble. Once we have con­duct­ed a free sur­vey of your garage we’ll know more about exact­ly what size and type of door you require and we’ll make any final quote amend­ments there and then.

The more accu­rate your mea­sure­ments, the less like­ly it is that we’ll have to change the amount you’re expect­ing to pay. Of course, you are under no oblig­a­tion to buy if you are no longer hap­py with the quote.

Our doors are list­ed with just two mea­sure­ments – the height and the width. These mea­sure­ments are shown as num­ber 1 and num­ber 2 on the instruc­tions below. If you find that your cho­sen door doesn’t come in the cor­rect size, please speak to one of our advi­sors as adap­tions can be made depend­ing on the open­ing mechanism.

  • Mea­sure­ment 1: Open­ing Width

    The full open­ing width of the door is from one side to the oth­er. Please mea­sure from brick to brick. The mea­sure­ment should be in mil­lime­tres or in feet & inch­es. It may help to mea­sure at more than one point to ensure it’s correct.
  • Mea­sure­ment 2: Open­ing Height

    The full open­ing height of the door is from the floor to the under­side of the lin­tel. Please mea­sure the full open­ing height either in mil­lime­tres or in feet & inch­es.

    These two mea­sure­ments should ensure you find the right sized door in our prod­uct range. It would help us if you could also take the fol­low­ing three measurements:
garage door measurement guide
  • Mea­sure­ment 3 & 4: Inte­ri­or Side Clear­ance
    Whilst inside your garage, you’ll need to mea­sure the space avail­able at the edges. Please mea­sure from the edge of the open­ing to the side wall.
  • Mea­sure­ment 5: Roof Clear­ance
    Whilst inside your garage, please mea­sure from the under­side of the lin­tel to the low­est part of the ceiling.


Roller Doors:

Roller doors require some slight­ly dif­fer­ent mea­sure­ments, as you must allow for the door roll when it’s open. Our stan­dard 77mm roller doors will need a min­i­mum of 300 – 350mm head­room in order to fit. The 55mm com­pact roller doors require 205mm of head­room. If you have this space between the ceil­ing of your garage and the lin­tel of the open­ing, then order­ing a stan­dard 77mm door with No Box should suffice.

If the head­room need­ed encroach­es into the open­ing of your garage, first make sure that there is still enough height for your vehi­cle to fit. In this sit­u­a­tion, a Half Box or Full Box may be required, depend­ing on where best to mount the door roll. We can con­firm this at your free survey.


Have ques­tions about how to mea­sure your garage door? Get in touch and let us help