Thornhill Security Ltd


Founded in 2008, Strongdor have quickly established themselves as a leading provider of security doors across the UK.

They specialise in the manufacture of of high quality, British made bespoke steel doors. Their range includes all types of steel doors including personnel doors, fire exits, security rated and acoustic doors.

As an approved supplier of Strongdor security doors, our experienced security staff at Thornhill Security can help with detailed product recommendations for their extensive range.

Contact our security team today to obtain free security advice on 0117 9674994.

Strongdor Security Products

Browse a selected range of Strongdor products currently available at Thornhill Security.

Shop Strongdor

To find out more about the complete range of security products available from Strongdor, give our team a call, fill out a contact form or pop into our fully stocked security shop.

What our Customers say ...

“Thornhill Security has provided me excellent service on two separate occasions providing access and repair of some security cabinets. The standard of workmanship has been high, and the customer service has been excellent”
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