Thermal and Fire Rated Steel Door

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Firedor Thermal Steel Door with Low U-Value for Energy Efficiency

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.

 

UK Net-Zero Target Drives Building Regulations

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.

 

Compliance with Part L and Fire Safety Standards

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.

  • FIRE RATINGS UP TO E60.
  • AVAILABLE AS PAS 24:2018.
  • OVER 150 COLOURS AS STANDARD.
  • EXCEPTIONALLY LOW U-VALUE AS LOW AS 1.5 W/m²K.
Unique Range Features

1 year warranty
Steel door experts
10-15 day lead time*
Trustpilot Rated Excellent

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Product Features

Height Icon
Height

Single - 2.762m
Double - 2.762m

Width Icon
Width

Single - 1.2m
Double - 2.3m

I10
Thermal transmittance - U-value

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

I5
Leaf thickness

44mm deep leaf skin

I6
Fire resistance

Fire rating up to E60

Strongdor Icons Acoustic
ACOUSTIC RATING

Up to 36dB rating.

NBS Specification

Further information

Features
Videos
Downloads

Frames

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.

 

Leaf

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 door with 2-point panic hardware.

 

Finish

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.

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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.

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Extended Colours & Coatings

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Firedor External - Emergency Exits & Personnel Doors

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Firedor Thermal - Emergency Exits & Personnel Doors

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Any questions about this product?

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Door Configurations

Emergency Exit Steel Doors & Personnel Steel Doors.

Emergency Exit Steel Doors
Personnel Steel Doors

Hardware Options

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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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