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.

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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