Measuring for Steel Garage Doors

Whether you’re ordering up and over or sectional doors, it’s vital to know which measurements you need to take in order to get the right door. CDC Garage Doors has been supplying and installing steel doors for a number of years and we can provide you with advice and guidance on how to do this correctly. If you have any questions you can talk to an expert member of staff by giving us a call on 0800 294 2002 or emailing

For up and over steel garage doors

Steel up and over doors can be installed in three ways – within an existing frame, inside a structural opening or in-between a structural opening. Depending on which of these is the option you’re using, you’ll need to supply different measurements to the manufacturer to ensure that you get the right door.

When working with an existing frame you will only need to supply the height and width within the frame. Likewise when working in-between a structural opening, you only need to supply the height and width of the opening. It’s more complicated if you’re installing inside a structural opening – here you’ll not only need the width and height of the opening but also the smallest reveal on both sides and the headroom available.

For roller steel garage doors

For roller garage doors you’ll either by buying an insulated door or a single-skin door. On both examples you’ll need to consult with us to ensure that you’re getting the right measurements as these differ by manufacturer.

For sectional steel garage doors

Once again with sectional doors, you’ll need to provide different measurements depending on whether your door is being installed inside or in-between a structural opening. Installing inside the opening you’ll need to speak to us regarding the manufacturers requirements, whereas in-between the opening you can usually take the height and width of the opening as well as the depth of the garage.