Security Doors

Thermally Rated Steel Doors

From only £853.00 Ex VAT (£1,023.60 inc VAT)
(Based on 1000mm x 2100mm)

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Why Buy the Thermally Rated Steel Doors?

Thermally Rated Steel Doors offer the perfect combination of robust security and energy efficiency — ideal for buildings where insulation is as important as protection. Engineered with insulated cores, thermal breaks, and weather-sealing technologies, these doors help maintain internal temperatures, reduce energy bills, and contribute to your building’s sustainability goals.

Whether you're insulating a warehouse, cold store, plant room or high-performance office block, these steel doors are a smart, long-term investment for maintaining comfort and cutting operational costs.


Benefits

  •    Superior Thermal Performance: With U-values as low as 1.4 W/m²K, these doors significantly reduce heat loss compared to standard steel alternatives.
  •   Energy Savings: Prevents draughts and heat transfer — reducing reliance on HVAC systems and lowering your carbon footprint.
  •   All-Weather Sealing: EPDM weather and draught seals around the frame and threshold protect against cold, wind, and moisture ingress.
  •   Year-Round Comfort: Keeps interiors warmer in winter and cooler in summer, ideal for temperature-sensitive environments.
  •   High Security: Reinforced steel construction and certified hardware ensure protection without compromising insulation.
     

Operation

  •    Manual and Electric Options depending on application — from plant access to regular staff entrances.
  •   Locking Systems:
    •       Multi-point or sashlocks for everyday use
    •       Optional panic exit hardware for fire escape routes
  •   Seamless Insulation: Integrated thermal breaks in the frame and leaf to prevent cold bridging.
  •   Closers & Seals: High-performance overhead closers with drop-down seals to enhance airtightness.
     

Applications

  •    Plant Rooms and Electrical Substations
  •   Energy-Efficient Warehouses
  •   Data Centres and Server Rooms
  •   Cold Storage Facilities
  •   Commercial Offices and Utility Buildings
  •   Schools, Hospitals, and Government Buildings
     

Certifications

  •    BS EN 14351-1: Thermal performance and weather resistance
  •   BS EN 1634-1: Optional fire-rated versions up to 240 minutes
  •   CE and UKCA Marked
  •   Optional PAS 24 for enhanced security

   All doors are tested as a complete system to ensure performance values are accurate and certified.

Information

Security Features

  •    Constructed from heavy-duty galvanised steel with reinforced steel frames for high-strength protection.
  •   Equipped with multi-point locking systems or high-security sashlocks as standard.
  •   Anti-jemmy hinge bolts and internal reinforcements for increased burglary resistance.
  •   LPS 1175 security ratings available for select configurations (optional upgrade).
  •   Optional security accessories include viewer scopes, limit stays, and reinforced panels.

Safety Features

  •    CE-marked and tested in accordance with EN standards for building safety compliance.
  •   Emergency escape hardware options available, including panic bars (ideal for fire exits).
  •   Optional safety stays and closer systems to control door movement and avoid slamming.
  •   Optional anti-finger trap hinge guards for personnel safety in public or commercial use.

 Insulation & Energy Efficiency

  •    Independently tested to provide thermal performance up to 1.5 W/m²K, helping reduce heat loss.
  •   Fully insulated core infills with high-density mineral wool or foam enhance thermal retention.
  •   Ideal for Part L Building Regulation compliance in thermally sensitive environments.
  •   Optional acoustic-rated cores also offer sound insulation for internal or external applications.

Design & Customisation

  •    Available in a wide range of RAL or BS colours with polyester powder coating for durability.
  •   Stainless steel, woodgrain, and specialist finishes available upon request.
  •   Bespoke vision panels (glazed or louvred) can be integrated for ventilation or light access.
  •   Choose from single, double, leaf-and-a-half or custom-sized door sets.

Operation & Controls

  •    Manually operated with various handle, lock and closer options.
  •   Compatible with access control systems including digital keypads, electric strikes, and maglocks.
  •   Optional door automation systems for high-traffic commercial entrances.
  •   Factory-fitted door furniture includes lever handles, closers, and optional drop seals.

 Installation & Warranty

  •    Made-to-measure manufacturing ensures perfect fit and thermal performance.
  •   Available for internal or external use; options for inward or outward opening.
  •   Adjustable fixing points for flexible reveal or face fix installation.
  •   Backed by manufacturer’s warranty up to 5 years on construction and finish.

Lead Time & Common Applications

  •    Standard lead time is approximately 10–15 working days; expedited options may be available.
  •   Widely used in plant rooms, warehouses, utility buildings, and commercial premises.
  •   Ideal for areas requiring thermal efficiency, such as heated storage rooms or office access.

Need more information?

Speak to one of our specialist advisors for more information about this product.