BS 4841-3:2006

Foreword
1 Scope
2 Normative references
3 Terms, definitions and symbols
4 Construction and composition
5 Requirements
6 Designation
7 Marking
Annexes
Annex A (informative) Method for the determination of areas
        of unbonded facings
Annex B (informative) Information for users and designers
Annex C (informative) Reaction to fire performance of PIR
        and PUR products and recommendations regarding
        their use
Annex D (informative) Information on the installation of
        roofboards into built-up roofs
Annex E (informative) Dimensional stability in built-up
        roofing
Bibliography

Determines requirements for rigid polyisocyanurate (PIR) and polyurethane (PUR) cored laminated boards (roofboards) with auto-adhesively or separately bonded flexible and/or rigid facings, for use as roofboard thermal insulation under built-up bituminous roofing membranes.

This British Standard specifies requirements for rigid polyisocyanurate (PIR) and polyurethane (PUR) cored laminated boards (roofboards) with auto-adhesively or separately bonded flexible and/or rigid facings, for use as roofboard thermal insulation under built-up bituminous roofing membranes. The standard also applies to product roofboards with one flexible and one rigid facing.

NOTE 1 Because of the changes introduced into this standard, products conforming to this standard also conform to BS EN 13165:2001 incorporating amendments 1 and 2.

NOTE 2 Additional information for the guidance of users, installers and designers is given in informative Annexes A, B, C, D and E to this standard.