Technical Note ECTN 9:
Elite wall systems fire performance Euroclad Elite wall systems (50 through to 60) have been developed and designed to provide superior fire performance and have been extensively tested in support of compliance with the Building Regulations Approved Document B (Fire safety).
Elite wall systems are built up metal cladding systems, not rainscreen cladding systems. The primary concerns relating to rainscreen systems which arise from extensive cavities combined with the use of combustible materials are not present in Elite Systems.
Elite wall systems employ solid external metal profiled sheets, non-combustible insulation (reaction to fire classification of A1 as defined in BS EN 13501-1) with a non-combustible metal spacer system and solid metal liner sheets.
The profiled polyester coated liner sheets and Prisma coated profiled external sheets are both classified in accordance with BS EN 13501-1 : 2002 as Class A1 and are therefore classed as noncombustible.
HPS200 Ultra coated profiled external sheets are classified Class O (National class) and Class C-s2, d0 (European class Reaction to Fire). They cannot therefore be classified as non-combustible in terms of Approved Document B Volume 2, however HPS200 Ultra coated sheets can be used as the external surface of buildings at all heights through reference to sections 12.6 and diagram 40 of Approved Document B via the classification of Class O (National class) and the note in diagram 40 stating “Profiled or flat steel sheet at least 0.5mm thick with an organic coating of no more than 0.2mm thickness is also acceptable”. The “200” in the name of HPS200 Ultra denotes a coating of 200 microns or 0.2mm.
The systems as a whole, including HPS200 Ultra coated external sheets, have been tested and assessed by Exova Warrington Fire in accordance with BS476 Part 22 and BS EN1364-1: 2015 and BS EN1363-1: 2012.
Installed to our standard specifications with a minimum of 120mm insulation they achieve a minimum 2 hours Integrity and 15 minutes insulation (or 30 minutes insulation when using Rockwool Cladding Roll insulation and stitched liner) when tested to BS476 Part 22.
The Building Regulations stipulate the test methods applicable for verification of compliance. In the case of establishing Fire Resistance both National and European tests methods are cited.
The building Regulations are intended to ensure that a reasonable standard of life safety is provided, in case of a fire. The protection of property is also of concern from an insurance perspective and in many cases the provision of life safety will, by definition, also contribute to protection of property.
In addition to undertaking numerous fire resistance tests for constructions to both British and European standards cited in the building regulations, Euroclad have also undertaken testing and certification under LPS1181 and LPS1208 with BRE Global LPCB certification scheme.
LPCB certification of the Elite systems began in 2008 and we have continued to update and maintain LPCB coverage for Elite systems. The certification is currently being updated to cover new and more cost effective options for the systems which have been tested during 2015 & 2016. The update is expected to be issued in Aug/September of this year. The coverage will be continue to be further updated as more systems and options have already been tested during 2017.