Rooftop Access Domes | Emergency Roof Window Units

Rooftop Access Roof Domes

Our range of rooftop access domes is engineered to provide a safe, reliable point of entry for roof maintenance or as a designated emergency roof window for egress. Designed with heavy-duty gas struts for effortless opening, these units provide a wide, clear-opening area to meet stringent safety requirements. Sourced from industry leaders such as Coxdome and Brett Martin, our access domes combine high-performance thermal insulation with the robust security features required by modern commercial and residential building standards.

Coxdome Access Hatch Roof Dome Splayed 150mm Kerb

From £431.00

View Product

Engineered for Safe Egress and Maintenance Access

In many commercial and multi-storey residential developments, providing a secure point of entry to the roof is a legal or practical necessity. A rooftop access dome serves a dual purpose: it acts as a high-transmission natural light source and a functional doorway to the roof environment. Whether required for plant machinery maintenance or as a secondary emergency roof window, these units are built to withstand frequent use while maintaining the integrity of the building’s thermal envelope.

Technical Features of Access Rooflights

Specifying a rooftop access dome requires attention to mechanical reliability. Our units are equipped with several key professional features:

Gas-Strut Assistance: High-pressure gas struts enable a smooth, controlled opening to approximately 85°–90°, ensuring the dome stays securely in place during use.

Internal and External Locking: Security is a priority. Our units feature robust internal handles with optional external locking mechanisms to prevent unauthorised entry from the roof side.

Non-Fragile Polycarbonate: Every emergency roof window in our range is manufactured from high-impact polycarbonate, meeting “non-fragile” ratings to ensure the safety of personnel working in proximity to the unit.

Thermal Efficiency and Compliance

Transitioning from a standard dome to an access unit does not mean sacrificing insulation. Our access domes are available in double, triple, and quadruple skin configurations to ensure compliance with Part L Building Regulations.

Triple Skin Domes: The standard for most new build projects, offering excellent U-values and minimising the risk of condensation.

Acoustic Insulation: The multi-layered polycarbonate construction also provides significant sound reduction, ideal for urban environments.

Choosing the Right Upstand and Size

When installing a rooftop access dome, the clear opening size is the most critical measurement. We provide a variety of splayed and vertical uPVC upstands (150mm or 300mm) to ensure the unit clears the roof finish and provides enough space for a person carrying tools or equipment to pass through comfortably.

Why Source from LB Supplies?

With over 35 years of industry experience, LB Supplies understands the complexities of roof specification. We provide technical data sheets and expert advice to ensure your emergency roof window meets the specific fire rating and safety requirements of your project.

Need a quote for a specific size? Contact our technical team today for expert guidance in selecting the right rooftop access dome for your flat roof project.