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published: 25/6/2008
This press release is over six months old and the details may have been superseded. Please contact the Press Office for the latest information.

LPS 1181 - The Facts

Incorrect and misleading reports on the purpose and application of the LPS 1181 series of standards for the fire performance of construction product systems are causing confusion in the market.

The facts regarding the use and application of the LPS 1181 standards are as follows:

  • The LPS 1181 series of standards cover sandwich panels and built up cladding systems including jointing and fixing methods, sealants, gaskets and flashings.
  • The Building Regulations define the life safety requirements for buildings.
  • Approved Document B (produced by Communities and Local Government) provides guidance on meeting the requirements of the Building Regulations for fire safety and utilises the test data from the BS 476 series and/or the BS EN 13501 series of standards.
  • The requirements of the Building Regulations are not addressed by the LPS 1181 series of standards.
  • The LPS 1181 series of standards are used by the insurance industry for property protection purposes.

The issues of life safety and property protection are addressed separately in terms of fire performance assessment test methods.

The LPS 1181 series of standards were developed in consultation with a wide range of key stakeholders including the Association of British Insurers (ABI) and the trade associations representative of all the sectors of panel manufacturers. They have been in use for many years and are under constant review. Any specific issues related to the use of these standards should be sent by email to enquiries@breglobal.com.

  • There are three parts to LPS 1181 series dealing with specific building applications:
  • LPS 1181 part 1: External envelope of buildings
  • LPS 1181 part 2: Internal constructions in buildings
  • LPS 1181 part 3 (draft): Factory produced room modules (PODS)

These standards can be downloaded free of charge from www.RedBookLive.com.

It is the responsibility of end users, whether they be specifiers, regulators, insurers, architects etc, to satisfy themselves that any performance claims made by the manufacturers are valid by reference to a relevant certificate, listing (see www.redbooklive.com) and/or test reports and that the product satisfies all the necessary regulatory and design requirements. This responsibility also extends to ensuring that the systems are installed correctly and in accordance with the manufacturer’s instructions.

Full details of the products approved to the LPS 1181 series of standards can be found at www.RedBookLive.com.

Within the LPS 1181 series of standards there are a number of classifications and these are summarised as follows: 

  •  Cladding systems used for the external envelope of buildings are tested to LPS 1181 part 1.  Those products that pass the test are graded into 2 classes: -
  • EXT A** - A product that satisfies the requirements of LPS 1181 part 1 and demonstrates fire resistance in accordance with LPS 1208 when tested to BS 476 part 21 or 22  (** is the insulation grade in minutes i.e. the resistance to the transfer of excessive heat)
  •  EXT B – A product that satisfies the requirements of LPS 1181 part 1 only.
  • Sandwich panels and built-up systems used internally in a building for the construction of cold stores, factory clean rooms, space separation etc are tested in the large-scale test in LPS 1181 part 2.  Those products that pass the test are graded into 3 classes: - 
  •  INT 1 – A product that achieves a minimum fire resistance performance of integrity = 60 minutes and insulation = 60 minutes and passes the requirements of the LPS 1181 part 2 large-scale test with an enhanced thermal exposure. 
  •  INT 2 – A product that achieves a minimum fire resistance performance of integrity = 30 minutes and insulation = 30 minutes and passes the requirements of LPS 1181 part 2 large-scale test with a crib ignition source.
  • INT 3 – A product that passes the requirements of LPS 1181 part 2 large-scale test with a crib ignition source but has no fire resistance.

A guide to example applications with the potential inception risks and associated LPS 1181 classes (part 1 and 2) can be found in appendices 1, 3 and 4 of “Technical briefing: Fire performance of sandwich panel systems” published by the Association of British Insurers in May 2003.
 
References

  • LPS 1181: Part one: Issue 1.1 - Requirements and Tests for Built-up Cladding and Sandwich Panel Systems for use as the External Envelope of Buildings
  • LPS 1181: Part two: Issue 2.0 - Requirements and Tests for Sandwich Panels and built-up systems for use as an internal constructions in buildings
  • LPS 1181: Part three: DRAFT - Requirements and Tests for Sandwich Panels and built-up systems for factory produced room modules (PODS)
  • LPS 1208: Issue 2.1 - LPCB Fire resistance requirements for elements of construction used to provide compartmentation
  • LPS 1500: Issue 1.0 - Requirements for the LPCB Approval and Listing of companies installing fire resistant compartment wall systems in buildings
  • LPS 1531: Issue 1.0 - Requirements for the LPCB Approval and Listing of companies installing or applying passive fire protection products
    Technical Briefing: Fire Performance Of Sandwich Panel Systems, Association of British Insurers, May 2003


Press enquiries: SUSAN ALLDER, Tel: 01923 664520, E-mail: allders@bre.co.uk; SIMON GUY, Tel 01923 664305, E-mail guys@bre.co.uk.


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