LPS 1505 Issue 1.1 Requirements and tests for the LPCB approval and listing of roofing systems – protection against fire from outside the building.
This document specifies the LPCB test requirements for classifying roofing systems when exposed to an external fire, and installed in accordance with the manufacturers’ instructions and typical site applications.
This standard does not cover roofing systems exposed to an internal fire.
Roofing products
Any material, composite or assembly about which information is required which can be fitted onto or forms a part of a roof system.
Roofing system
Fabrication of materials and/or composites – A roofing system is made up from a number of products – usually comprising of a roof covering, thermal insulation and roof deck.
Sandwich panels etc. are also included.
Approved test facility
A facility which has been approved by an International Accreditation Forum Member such as UKAS to carry out the stated test.
Classification of roofing systems
Roofing systems which have been tested to the methodology of BS476 Part 3: 2004, Fire tests on building materials and structures – Part 3: Classification and method of test for external fire exposure to roofs, may be classified and approved to this standard.
Prior to examination and testing, the applicant shall supply LPCB with comprehensive information regarding the system, its installation and its maintenance.
All documents shall be controlled.
The applicant shall provide at least the following detailed information relating to the system, across the range of sizes and specifications for which approval is sought.
- A statement if the system is for sloping or flat roof applications
- General assembly drawings, including size, type and pitch of any fixings.
- Component drawings.
- Material specifications.
- Details of range of finishes/insulation, thickness and type of substrates.
- Information regarding fixing techniques for alternative supporting constructions.
- Any other relevant information.
- Installation instructions.
- Maintenance instructions.
All drawings should include tolerances. If options are allowed such as alternative materials etc, information on these shall also be included.
Construction Requirements
3.2.1 The construction of roofing products shall be verified by audit at the manufacturer’s site or other suitable installation site, the construction and scope of approved systems shall be clearly defined in any sales, specification and installation documentation.
Test Requirements
The systems shall be tested in accordance with:
BS 476-3:2004 – Fire tests on building materials and structures Part 3: Classification and method of test for external fire exposure to roofs.
Historical test data to BS 476: Part 3:1958 may also be acceptable as supporting data but cannot be used as sole evidence for application to the scheme.
Minimum test programme
The test programme will be decided by LPCB in consultation with the manufacturer. The test programme is to be developed for each application on the basis of the full scope of approval requested and taking full account of all variations of the system and the elements detailed in Scheme Document SD198.
For purposes of LPCB approval and listing, any roof covering system must demonstrate that it can achieve an acceptable fire exposure rating over the application range envisaged by the client.
Field of Application
The field of application will be based upon the system tested. Guidance is given in scheme document SD198.
CLASSIFICATION AND DESIGNATION
Roofing systems shall be classified in accordance with section 4 of BS476-3:2004. Approval and listing will only be considered under this scheme for those products and systems achieving the following
Where,