BS 747:2000

Committees responsible
Foreword
1 Scope
2 Normative references
3 Class 1 - Bitumen sheets (fibre base)
4 Class 3 - Bitumen sheets (glass fibre base)
5 Class 4 - Sheathing felts
6 Class 5 - Bitumen sheets (polyester base) with oxidized
                bitumen coating
Annex A (informative) Uses of BS 747 products
Annex B (normative) Procedure for sampling and selection of
                    specimens of roofing sheets and methods of
                    determining the masses of constituent
                    materials
Annex C (normative) Procedure for the selection and testing of
                    samples of base material
Annex D (normative) Procedures for testing bitumen polyester
                    sheets
Bibliography
Table 1 - Masses per unit area of components and lengths of
          rolls of Class 1 bitumen sheets (fibre base)
Table 2 - Class 3 bitumen sheets (glass fibre base) -
          Composition and roll lengths
Table 3 - Nominal masses of Class 4 sheathing felts
Table 4 - Physical test requirements of polyester base
Table 5 - Class 5 bitumen polyester sheets - Composition

Defines requirements for reinforced bitumen roofing sheets used in Britain and other countries with similar climates.