Steel Security Doors

Secure Your Premises with a Steel Security Door

Constructed of high-quality steel, steel security doors provide extra protection at points of entry for commercial and industrial buildings as well as homes, giving peace of mind against break-ins. Whether you are looking for a personnel door, Emergency Exit door, thermal rated door or a security rated door that can withstand significant assaults, Thornhill Security can provide the right one for your needs.

Steel security doors can be used in a range of commercial environments both internally and externally, we are able to supply shops, garages, warehouses, jewellers, offices, schools, pharmaceutical companies, and more. Security doors can also provide extra security for residential premises.

Unlike ordinary external doors made from materials such as timber, uPVC or composite, a steel security door cannot be forced open with basic tools, and does not crack under impact, preventing burglars from quickly gaining entry to a business or property.

At Thornhill Security, we stock Strongdor and all our steel doors are installed by qualified professionals. Our expert team can help you at every step from consultation to after care. Call us with any questions on 0117 967 4994.

For more details about locks, fire resistance, colours and insulation, see features and benefits below.

Our Security Doors

Steeldor Steel Personnel Door
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Security Rated Steel Door - Atakdor
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Strongdor Thermally Rated Steel Door
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Strongdor Steel Emergency Exit Door
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Features and Benefits of Steel Security Doors

High-security steel doors offer several benefits compared to traditional doors:

Security – Made of steel with a reinforced frame, steel doors do not crack under impact, feature an anti-jemmy bar lip to prevent crowbar entry, flat stainless steel thresholds and are drill resistant.
Maintenance – Due to the steel construction which is often galvanised, steel security doors require very little to no maintenance.
Fire Resistance – Unlike doors made from composite, timber or uPVC, steel security doors are completely fire-resistant and can be fitted with additional fire protection and safety features.
Locks – Our high-security steel door sets come with a range of locking systems from 12 point locking mechanisms to multi-lock systems.
Insulation – Steel security doors provide a high level of insulation as standard and are more energy-efficient than traditional doors. This insulation also offers protection against unwanted noise.
Styles – Steel security doors are available in a wide range of finishes, glazing shapes, designs, and colours to complement the aesthetics of your premises.

You may find it helpful to also read our blog, Why Your Business should Consider a Steel Security Door

Fire Protection & Safety Features

As well as being fire-resistant, steel security doors can be fitted with additional features to improve the safety of the building and its users.

If your security doors are needed for a commercial building, we can fit them with panic bars for quick release allowing personnel to escape quickly in the event of a fire or other emergency.

We have a full range of fire exit steel security doors and can arrange professional installation for all of our products.

Let us help you at every stage of having a new steel security door fitted. From consultation to aftercare

0117 967 4994

Testimonials

Used Thornhill security many times in my business, [...] The building my shop is in is mid 19th century and some of the doors are equally as old, their dedication to ensuring everything is working correctly is second to none. [...] I couldn't even think about using anyone else.

Thomas

Bristol

Why Choose Thornhill Security?

With over 50 years of experience and a physical retail premises in Kingswood, Bristol we truly understand the requirements of our customers and offer a level of customer service often missing from purely online operations. We promise…

A fast, local service, dealing with one contractor from start to finish.
We only use our in-house team and don’t sub out our work
We are MLA approved locksmiths
We have relationships with all leading manufacturers
We are a Government approved supplier and have the following accreditations (SafeContractor, Construction Line, BSVTA, MLA).