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.

To manufacture the best fitting door, Strongdor will require the structural opening (brick to brick).

We will make the necessary fitting allowances on the size of the door frame. If the opening is wider at the top than the bottom or vice versa, please give us the width at the narrowest point.

View our knowledge library document - Accurately Measuring For Your Steel Door for further guidance.

It is the customer’s responsibility to ensure all details within the sales quotation / sales order meet the exact specification and / or original enquiry and are compliant with current building regulations including location and method of installation.

We are here to help and advise only and cannot accept responsibility for discrepancies after the order is confirmed.

Strongdor Terms and Conditions