Fire Rated Roof Access Hatch

Key Specification Highlights:

• Fire rated up to 4 hours (E240) for integrity and 58 minutes (EI58) for insulation, tested and certified to BS EN 1634-1:2008, BS EN 1363-1:1999, and UL-EU-01074-CPR
• Thermally broken aluminium and galvanised steel construction with double-skinned insulated lid
• 75 mm PIR polyisocyanurate insulation achieving 0.26 W/m²K thermal performance
• Gas spring assisted opening with hold-open stay arm and heavy duty aluminium hinges
• 300 mm insulated kerb upstand with external curb liner and cap flashing fitted as standard
• Unbroken double seal to lid for superior air and smoke leakage performance
• Available in mill finish aluminium, anodised, or polyester powder coated (single or twin colour to any RAL)
• Standard and fully bespoke sizing available
• Compatible with fixed vertical ladders, companionway ladders, and ZIP retractable ladder systems
• BIM objects available in IFC and Revit formats to NBS BIM Object Standard
• Manufactured in the UK to BS EN ISO 9001 certified processes

Product Overview

The Surespan SRHTB/FR is a premium fire rated thermally broken roof access hatch designed to maintain the fire compartmentation integrity of the roof structure whilst providing safe, convenient rooftop access and means of escape. This is the definitive fire rated roof hatch for architects and specifiers working on projects where fire safety compliance under Approved Document B, BS 9991:2024, and the Building Safety Act 2022 is paramount.

Independently tested and certified to BS EN 1634-1:2008 and BS EN 1363-1:1999, the SRHTB/FR achieves up to 240 minutes (E240) of fire integrity performance and up to 58 minutes (EI58) of combined integrity and insulation performance. The product carries UL-EU certification (UL-EU-01074-CPR), providing internationally recognised third-party verification of its fire resistance capabilities — a critical differentiator for specifiers working on projects that demand certified, auditable fire safety documentation.

Construction and Materials

The SRHTB/FR is constructed from a combination of aluminium and galvanised steel, delivering a robust fire-resistant structure with excellent long-term durability. The lid features a double-skinned aluminium construction with internal fire-resistant insulation, thermally broken to eliminate cold bridging at the hatch junction. The 300 mm kerb upstand is insulated and fitted with an external curb liner and cap flashing as standard, enabling straightforward integration with hot or cold applied roofing membranes. All corner joints are fully welded and reinforced.

Standard insulation is 75 mm PIR polyisocyanurate board achieving a U-value of 0.26 W/m²K, supporting compliance with Part L of the Building Regulations for conservation of fuel and power. For applications requiring non-combustible insulation, mineral wool alternatives are available.

Fire Performance and Certification

Fire performance is at the core of the SRHTB/FR. The product has been independently tested under controlled laboratory conditions in accordance with the European harmonised test standards BS EN 1634-1:2008 (fire resistance tests for door and shutter assemblies) and BS EN 1363-1:1999 (general requirements for fire resistance testing). Results demonstrate:

• Integrity (E): Up to 240 minutes — the hatch prevents the passage of flames and hot gases for up to 4 hours
• Insulation (I): Up to 58 minutes — the unexposed face temperature remains below critical thresholds, protecting personnel and the building fabric on the non-fire side

The UL-EU certification (reference UL-EU-01074-CPR) provides CE/UKCA marking compliance under the Construction Products Regulation, giving specifiers full confidence in the product's declared performance values.

Operation and Safety

The SRHTB/FR operates via gas spring assisted opening, delivering smooth, controlled lid movement with minimal user effort even on larger hatch sizes. Heavy duty aluminium hinges and a secure hold-open stay arm prevent unintended closure during roof access operations. As standard, the hatch comes fitted with an internal cablock for secure closure from inside.

Multiple locking options are available: LO4 padlockable external handle with toggle latch and internal cablock, LO6 European deadlock with thumb turn internal and key external mechanism, and LO7 European deadlock with dual internal and external key operation. For enhanced personnel safety, the SRHTB/FR is fully compatible with Surespan's SureGuard hatch railing system, fixed and retractable handhold accessories, and the complete range of ZIP retractable, companionway, and fixed vertical ladders.

Sizes and Finishes

The SRHTB/FR is available in standard sizes and fully bespoke dimensions to suit any opening requirement. Finish options include mill finish aluminium, anodised aluminium, and polyester powder coating to any RAL colour in single or twin colour configurations. The product is manufactured in the UK from Surespan's dedicated factory facilities in the West Midlands.

Compliance and Specification Support

The SRHTB/FR supports compliance with Approved Document B (fire safety, including means of escape and fire compartmentation), Approved Document L (conservation of fuel and power), BS 9991:2024 (fire safety in residential buildings), BS 9999 (code of practice for fire safety in non-residential buildings), the Building Safety Act 2022, and the Regulatory Reform (Fire Safety) Order 2005. Full technical specification support is available including product datasheets, submittal drawings in PDF and DWG format, fitting instructions, O&M manuals, and BIM objects.

For technical assistance, bespoke quotation, or to book a RIBA-accredited CPD seminar on safe access and escape, contact Surespan at sales@surespancovers.com or call +44 (0) 1922 711185.

Product page: https://surespancovers.com/product/fire-rated-roof-hatch/?utm_source=nbs&utm_medium=referral&utm_campaign=nbs-product-srhtb-fr

Resource downloads: https://surespancovers.com/resource-centre/roof-hatch-resources/?utm_source=nbs&utm_medium=referral&utm_campaign=nbs-product-srhtb-fr