Technical Specifications, BS EN 13501

BS EN 13501-1: 2018 and BS EN 13501-5: 2016

BS EN 13501-1 Reaction to Fire, sometimes known as the Euroclass, and BS EN 13501-5 External Fire Exposure to Roof Tests, have become the relevant standards reference in Approved Document B for England relating to the fire performance of building materials - for roofs and walls but also in relation to internal surfaces, components within systems and around junctions of compartment walls, roofs, floor slab edges and walls.

BS EN 13501-1 lists a material’s reaction to fire classification, otherwise known as Euroclass, under three matrices: reaction to fire A-F, smoke growth rate s1 - s3, and propensity to create burning droplets d0- d2.

Testing

Most important is the distinction between Non-Combustible (Class A1), Limited Combustibility (Class A2) and Combustible products (Class B - F and unclassified). One of the important tests in defining Non-Combustible is a Calorific Value test, measured to BS EN ISO 1182:2020 and BS EN 1706:2018. In order to achieve a non-combustible classification products must have a calorific value of under 2.0MJ/kg, along with other requirements. For a product to achieve A2 limited combustibility it must have a calorific value of under 3.0MJ/kg, along with other criteria.

Specifically for England, compliance with Building Regulations under Approved Document B, section B4, requires wall cladding materials of all buildings above 18m in height to use products that are at least Euroclass B-s3,d2 or better for all areas of the walls above 18m. For further information please contact CA Group Technical Department, or refer to Approved Document B, section B4, Table 12.1 (for England published 2010, latest revision 2024). For guidance on compliance with building regulations in the UK developed regions please contact CA Group Technical Department.

BS EN 13501-5 relates to roof systems, and addresses the risk of fire spread from adjacent buildings. Many metal roofing systems are likely to fall into the B _ROOF (t4) category making them appropriate for use at the junctions of a roof with a compartment wall (so long as the construction and products also comply with the requirements of Approved Document B (Section B3 Diagram 8.2).

Products

Therma-quilt insulation:
A1 non-combustible

Colorcoat Prisma^®, Colorcoat^® PE15 liner, Colorcoat^® High Reflect liner:
A1 non-combustible, all roof systems and gutters: B_ROOF (t4)

Colorcoat HPS200 Ultra^®:
C-s2, d0

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Technical Specifications

Euroclass

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Technical Specifications

BS 476

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Technical Specifications

Reaction to Fire

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Technical Specifications

Class O Surface

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Technical Specifications

LCPB / LPS 1181

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Fire Performance Technical Specifications

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Technical Specifications

Euroclass

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Technical Specifications

BS 476

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Technical Specifications

Reaction to Fire

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Technical Specifications

Class O Surface

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Technical Specifications

LCPB / LPS 1181

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