Custom and Fire Rated GRP Rooflights

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Fire Ratings

• Class 3 to BS 476-7 (D-s3, d2^a) / SAB to BS 476-3 (B_ROOF (t4)^b)
• Class 1 to BS 476-7 (C-s3, d2^a) / SAA to BS 476-3 (B_ROOF (t4)^b)
• Class 0* (B-s3, d2^a) / SAA to BS 476-3 (B_ROOF (t4)^b)

^{* There is no longer reference to Class 0 in Approved Document B, but the transposition to national class of B-s3,d2 (appendix B, table B1) is defined as meeting the criteria shown in items a. and b. (detailed below) - which was the previous definition for the Class 0 rating. a. class 1 in accordance with BS 476 part 7 b. has a fire propagation index (I) of a maximum of 12 and sub-index (i1) of a maximum of 6, in accordance with BS 476-6}

^{a Transposed BS EN 13501-1 Classification from Approved document B Table B1}

^{b Transposed BS EN 13501-5 Classification from Approved document B Table B2}

^{**GRP is a thermosetting rather than thermoplastic material, and the concessions allowing the use of Tp(a) or Tp(b) rated sheet are not relevant as our GRP rooflights satisfy the national class transposition rating requirement.}

Weights

• 1.83kg/m² (Internal Liner Only)
• 2.44kg/m² (Minimum weight for Class C Non-Fragile Classification to ACR[M]001)
• 3.06kg/m² (Minimum weight for Class B Non-Fragile Classification to ACR[M]001)
• 3.66kg/m² (Minimum classification to BSEN1013: 2012 for expected 25 year non-fragility)
• 4.50kg/m² (Supasafe)