BS 4841-3:1994
BS 4841-3:1994
Rigid polyurethane (PUR) and polyisocyanurate (PIR) foam for building applications. Specification for two types of laminated board (roofboards) with auto-adhesively bonded reinforcing facings for use as roofboard thermal insulation for built-up roofs
standard published 01/15/1994 by British Standards Institution