BS 7457:1991
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Specification for polyurethane (PUR) foam systems suitable for stabilization and thermal insulation of cavity walls with masonry or concrete inner and outer leaves
Hardcopy , PDF
15-04-1994
English
30-09-1991
Describes the property requirements, composition, and the production parameters of rigid polyurethane foam systems, which are dispensed on site, to fill the cavities of maximum width 150 mm of suitably constructed external walls of maximum continuous cavity height 12 m which have masonry or concrete inner and outer leaves, thereby providing additional thermal insulation. Covers property requirements, processing requirements, notes for designers, method for the determination of masonry adhesion strength, of the polyurethane foam appearance. of effective density and of the polyurethane foam system reaction profile.
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