Thornhill Security Ltd


Established for over 50 years, Robust is the UK’s leading supplier of steel security doors, with solutions to meet the needs of even the most challenging environments.

All steel doors from Robust are made to measure at their UK factory and are certified by several organisations such as Secured by Design, the Loss Prevention Certification Board and WarringtonFire for complete peace of mind.

At Thornhill Security, we offer a range of steel security doors including products from Robust which provide a superior security solution compared to timber, uPVC or composite.

Robust Security Products from Thornhill Security Bristol
Robust Security Doors on Plant Room

Security Products from Robust

The range of security products from Robust includes high quality doors for external and internal use in commercial environments:

  • Glazed Doors – Fire resistant steel profile system to create transparent, fireproof and secure building interiors.
  • External Steel Doors – High performance external steel doors made to industry leading specifications. Available with fire resistance and panic bars for quick release as required.
  • Internal Steel Doors – Cost effective internal doors that don’t compromise on security. Available with 60, 120 and 240 minutes of fire protection.
  • Louvred Doors – Louvred security doors for rooms that require a continuous flow of air for ventilation. Much stronger than traditional aluminium louvres.

Security doors from Robust are available with several customisations including locking mechanisms, finishes and frames to suit your needs.  Due to the steel construction of these doors, there is almost zero maintenance required to keep the door secure and working as expected for many years.  What’s more, doors manufactured by Robust using corrosion resistant steel have an anti-corrosion warranty of up to 10 years as standard.  In comparison to timber, uPVC or composite doors, a steel security door will excel in just about every comparison including security, maintenance requirements, fire resistance, insulation, cost effectiveness and aesthetics.

As an approved stockist of Robust security doors, we can help with every aspect of your steel security door installation – from choosing the best door for your premises through to installation and aftercare.  Our team has excellent knowledge of Robust’s product range and can help choose the best door for your needs and help with secondary security measures to make your premises even more secure.

For more information about steel security doors from Robust, give one of our team a call today on 0117 967 4994.

Shop Robust Steel Doors at Thornhill Security

For more information about steel security doors from Robust, give one of our team a call today, fill out a contact form or pop into our fully stocked security shop.

What our Customers say ...

“Thank you to you and the chaps that carried out the safe move for a quick and professional response to our needs. I will keep your details on file in case of any future requirements."
Mr Lumsdon
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