Premium Steel Doors Manufactured in Britain
Premium Steel Doors Manufactured in Britain 
The Firedor Thermal Steel Door delivers excellent thermal insulation with a U-value as low as 1.5 W/m²K. Designed for high energy efficiency, this insulated, fire-rated steel door is part of the Strongdor range. It is CE marked to BS EN 14351-1 and EN 1634 standards and holds UKCA certification for quality and safety.
To meet the UK government’s goal of net-zero carbon emissions by 2050, building regulations now require better energy performance. Part L of the Building Regulations sets stricter minimum standards for energy efficiency in new and existing buildings.
The Firedor Thermal Steel Door complies with the updated Part L Building Regulations in England. It provides a fire rating up to E60 while maintaining a low U-value of 1.5 W/m²K. This makes it ideal for buildings needing both fire safety and energy efficiency. Previously, this product was known as Climador.
1 year warranty
Steel door experts
10-15 day lead time*
Trustpilot Rated Excellent
Single - 2.762m
Double - 2.762m
Single - 1.2m
Double - 2.3m
Single - As low as 1.6 W/m2K
Double - As low as 1.5 W/m2K
44mm deep leaf skin
Fire rating up to E60
Up to 36dB rating.
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
Mico Modular or MSR available in personnel or panic options.
Fire tested both sides, except a single door with 2-point panic hardware.
Supplied inclusive of a powder-coated finish in a standard colour. Full range of RAL and BS colours available.
Fire-rated up to E60 and UKCA | CE marked to BS EN14351-1 and EN 16034 standards.
Up to 36dB rating.
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.
Speak to an expert now
01524 727000 Emergency Exit Steel Doors & Personnel Steel Doors.
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
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!
Purchase steel doors regularly? Speak to one of our account managers and request to set up an account today.
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