Do Balcony Decking Materials Impact Fire Safety Compliance in 2025?

Fire safety remains a top priority for the construction industry in 2025, especially where balconies are concerned. With the introduction of the Building Safety Regulator (BSR) and updated legislation, materials used on balconies are under greater scrutiny than ever before. But how much do decking materials really impact compliance?

Over the last few years, there has been a sharp increase in balcony fires across the UK and Ireland. Most have been linked to the presence of combustible materials such as timber or wood-plastic composites. These surfaces can quickly ignite when exposed to a source of heat, turning a small incident — like a dropped cigarette — into a full-blown emergency.

As a result, regulatory bodies have stepped in with stricter fire safety guidance and clearer expectations for what is and isn’t acceptable in high-rise and high-risk buildings.

When talking about fire compliance, the classification of materials is essential. Under BS EN 13501-1, materials are graded on their combustibility. A1-rated materials are completely non-combustible, while A2-s1,d0 materials are also non-combustible but may emit minimal smoke or droplets during exposure to fire.

For external balconies on residential buildings over 11 metres, the regulations now mandate that all materials must be of limited combustibility — meeting either A1 or A2-s1,d0. This means materials like timber and composite are no longer permitted in most cases.

Timber has long been used in balcony construction due to its low cost, but it’s no longer viable in today’s regulatory environment. Composite materials also fall short due to the inclusion of plastic polymers. In contrast, aluminium is naturally fire-resistant and, when powder-coated correctly, can easily achieve an A2-s1,d0 fire rating.

AliDeck’s aluminium decking boards are specifically engineered to meet these fire classifications, ensuring that developments remain safe and legally compliant.

The Building Safety Regulator plays a pivotal role in enforcing fire compliance. Building Control is also becoming more rigorous during Gateway reviews. Decking materials, soffits, drainage elements, and balustrades must all be considered together during specification and design. AliDeck supports contractors, developers, and architects at every stage, offering CPD sessions, CAD details, fire test data, and full product specifications to streamline approval processes.

Beyond compliance, aluminium offers long-term benefits. It’s corrosion-resistant, highly durable, and requires very little maintenance. This makes it a cost-effective solution for developers and housing associations looking to avoid long-term remedial work. AliDeck’s systems are also modular, which allows for quicker installation and flexibility across new build and retrofit projects.

All AliDeck systems are backed by extensive fire testing and third-party validation. Our decking boards, soffits, and balustrade components are made in the UK from extruded aluminium, manufactured and powder-coated in-house. This not only ensures consistent quality but also allows us to respond quickly to project requirements, often delivering within four weeks.

By choosing AliDeck, you can be confident that your balcony system will meet the latest BSR regulations, help protect residents and ensure peace of mind for developers and project stakeholders.

If you’re unsure whether your current balcony specification meets the latest standards, or you’re planning a new development, now is the time to review your material choices. We offer one-to-one support to review designs, provide updated fire classification reports, and help you submit compliant specifications to Building Control.

Our team can also host CPD sessions and factory tours to demonstrate how our products are manufactured and tested.

For more information on specifying fire-rated balcony decking systems, or to book a CPD session, contact our expert team today at info@alideck.co.uk or call 01622 534050.