Thermal and Fire Rated Steel Door

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Our Firedor Thermal Steel door has an exceptionally low U-Value as low as 1.5 W/m2K and has been added to the Strongdor range to address the growing demand for thermally proficient, insulated, fire rated steel door-sets. CE marked to BS EN 14351-1 and EN 1634 standards and UKCA.

The UK government has committed to reducing carbon emissions and meeting its target of net-zero emissions by 2050. In line with this, several changes have been made to the building regulations to improve the energy efficiency of buildings. One such change is to Part L of the building regulations, which sets minimum standards for the energy efficiency of building.

With a fire rating up to E60, our Firedor Thermal steel door meets the new Part L Building Regulations for England, achieving a U-value as low as 1.5W/m2K whilst also achieving a fire rating. 
Previously known as Climador.

  • AVAILABLE AS PAS 24:2018
Unique Range Features

1 year warranty
Steel door experts
10-15 day lead time*
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Product Features

Height Icon

Single - 2.762m
Double - 2.762m

Width Icon

Single - 1.2m
Double - 2.3m

Thermal transmittance - U-value

Single - As low as 1.6 W/m2K
Double - As low as 1.5 W/m2K

Leaf thickness

44mm deep leaf skin

Fire resistance

Fire rating up to E60

Strongdor Icons Acoustic

Up to 36dB rating.

Further information


Manufactured from lightweight, high tensile 1.5 mm thick ‘Rustec’ steel.
Adjust 2-Fit side expander system that offers up to 12mm expansion to the structural opening.

44mm door leaf thickness incorporating an integrated astragal for added security. Comprising of 1.2mm 'Rustec’ steel sheets, the leaf skins are mechanically interlocked and internally bonded, proving greater stability and protection against de-lamination.
Insulated core offers a U value as low as 1.5 W/m2K

Door Ironmongery
Mico Modular or MSR available in personnel or panic options.
Fire tested both sides, except a single 2-point panic.

Supplied inclusive of a powder-coated finish in a standard colour. Full range of RAL and BS colours available.

Fire Rating
Fire-rated up to E60 and UKCA | CE marked to BS EN14351-1 and EN 16034 standards.

Acoustic Rating
Up to 36dB rating.

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Single Door Installation

This video contains detailed, step-by-step instructions for the safe installation of a Strongdor Steeldor single door-set. Please pay particular attention to the safety instructions.

Strongdor Double Door Install Thumbnail

Double Door Installation

This video contains detailed, step-by-step instructions for the safe installation of a Strongdor Steeldor double door-set. Please pay particular attention to the safety instructions.


Standard Colours & Coatings

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Firedor - Emergency Exits & Personnel Doors

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Firedor Thermal - Emergency Exits & Personnel Doors

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Door Configurations

Emergency Exit Steel Doors & Personnel Steel Doors.

Over 150 colours available

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Frequently Asked Questions

Who is responsible for ensuring the sales quotation meets the specification and building regulations, including location and method of installation?

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

Do Strongdor offer a site measuring or an installation service?

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!

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