FEB / NSAI Certificate in relation to Fire Testing and Safety.
4.2 BEHAVIOUR IN RELATION TO FIRE
The reaction to fire classification according to IS EN 13501-1:2007 Fire classification of construction products and building elements – Classification using data from reaction to fire tests for the FAST SA, FAST SM External Insulation System is defined as B – s2, d0. The FAST W External Insulation System is defined as A2- s2, d0. Systems that achieve a Class B or better i.e. Class A) Reaction to Fire Classification are suitable for use up to a maximum of six storeys (18 metres) in height on purpose groups 1(a), 1(b), 1(c), 2(a), 2(b), 3, 4(a) and 4(b) as defined in TGD to Part B of the Building Regulations 1997 to 2011. The mineral wool board is classified as noncombustible as per Table A8 (d) of TGD to Part B of the Building Regulations 1997 to 2011. Systems for which no reaction to fire performance has been determined are suitable for use on Residential Dwellings (Purpose Groups 1(a) and 1(b), not more than 18m high. These systems may not be used on a wall which is less than 1m away from a boundary wall. Reference should be made to Section 4.1 and 4.2 of TGD to Part B of the Building Regulations 1997 to 2011. The mineral wool board is classed as noncombustible as per Table A8 (d) of TGD to Part B of the Building Regulations 1997 to 2011. With regard to fire stopping and limitations on use of combustible materials, walls must comply with Sections B3.2, B3.3, B3.4 and B4 of TGD to Part B of the Building Regulations 1997 to 2011. Stainless steel fire fixings to be provided at the rate of one per square metre when specified. The fixing design should take account of the extra duty required under fire conditions. Vertical and horizontal lamella fire barriers shall be provided at each compartment floor and wall, with fixings provided at 400mm vertical centres and 400mm horizontal centres respectively, including the second floor level of a three-storey single occupancy house. Firebreaks should be adhesively bonded to the substrate (i.e. ribbons or dabs of adhesive is not acceptable) and mechanically fixed with stainless steel fire fixings at 400mm centres. The fire barrier shall be of non-combustible material (i.e. stone mineral wool (lamella), slab of minimum density 120kg/m3), be at least 200mm high, continuous and unbroken for the full perimeter of the building and for the full thickness of the insulation. Glass wool is not suitable for use as a fire stop.
4.3 PROXIMITY OF HEAT PRODUCING APPLIANCES
Combustible material must be separated from a brick or blockwork chimney by at least 200mm from a flue and 40mm from the outer surface of the brick or blockwork chimney, in accordance with Clause 2.15 of TGD to Part J of the Building Regulations 1997 to 2011. Metal fixings in contact with combustible materials should be at least 50mm from a flue.