BS 7457:1994
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
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
02-01-2024
English
15-04-1994
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Committees responsible
Foreword
Specification
Introduction
1. Scope
2. References
3. Definitions
4. Designation of polyurethane foam
5. Property requirements
6. Processing requirements
Annexes
A. (informative) Notes for designers
B. (normative) Method for the determination of masonry
adhesion strength
C. (normative) Method for the determination of the
polyurethane foam appearance
D. (normative) Method for the determination of
effective density
E. (normative) Method for the determination of the
polyurethane foam system reaction profile
Tables
1. Designation codes for thermal conductivity
2. Property requirements: type tests
3. Property requirements: quality control tests
4. Permissible deviations on declared values for
polyurethane foam system components
List of references
Specifies the property requirements, production parameters and composition of suitable rigid polyurethane foam (PUR) systems suitable for stabilising and thermal insulation of cavity walls with masonry or concrete inner and outer leaves. Also gives definitions, tables and annexes.
| Committee |
B/540
|
| DevelopmentNote |
Supersedes 92/45661 DC and BS 7457(1991) (10/2005) Reviewed and confirmed by BSI, December 2009. (11/2009)
|
| DocumentType |
Standard
|
| Pages |
12
|
| PublisherName |
British Standards Institution
|
| Status |
Withdrawn
|
| Supersedes |
This British Standard specifies the property requirements, composition, and the production parameters of suitable rigid polyurethane foam (PUR) 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 to such walls and simultaneously, especially in the case of damaged wall ties improving their structural integrity.
| BS 7456:1991 | Code of practice for stabilization and thermal insulation of cavity walls (with masonry or concrete inner and outer leaves) by filling with polyurethane (PUR) foam systems |
| BS 1610-2:1985 | Materials testing machines and force verification equipment Specification for the grading of equipment used for the verification of the forces applied by materials testing machines |
| BS 4735:1974 | Laboratory method of test for assessment of the horizontal burning characteristics of specimens no larger than 150 mm x 50 mm x 13 mm (nominal) of cellular plastics and cellular rubber materials when subjected to a small flame |
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