Knowledge Bank

No, Strongdor are a supply only manufacturer and therefore unfortunately don't offer site surveys or installation. However we can recommend local installers in your area from our Doorfit Network, who will be happy to help.

Complete our quotation request form, mention you are looking for installation and we will put you in touch!

The clear opening width is the size of the gap any persons/objects can pass through freely when the door is opened to its full potential. View our full document on Clear Opening Width's.

Strongdor Ltd are specialists in the manufacture and supply of quality steel doors for commercial clients throughout the UK.

Strongdor Ltd are committed to promoting sustainability and continually working to reduce the environmental impacts of all aspects of our business.

You can read our full sustainability policy here.

In simple words, yes . All our doors are individually constructed using the same process, however the Firedor range does come with additional features that set them apart from our standard Steeldor sets.

No, these dimensions are not the same. The structural opening size refers to the internal measurements of your aperture. When requesting a quotation from us, it is crucial to specify only the structural opening size. For more information on how to accurately measure the structural opening, you can view our easy online guide within the Knowledge Library on our website.