BS 7021:1989
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
02-01-2024
30-06-1989
Foreword
Committees responsible
Code of practice
0. Introduction
1. Scope
2. Definition
3. Composition and designation
4. Thermal performance of installed foam
5. Insulation of existing roofs
6. Insulation of new roofs
7. Primers and vapour check coatings
8. Foam application procedure
9. Protective membranes
10. Health and safety aspects
11. Fire performance
Appendices
A. Method for determining the on-site adhesive strength
of sprayed rigid PUR or PIR foam
B. Method for the on-site determination of overall
foam density
Figures
1. Characteristic sprayed foam surface texture:
smooth
2. Characteristic sprayed foam surface texture:
orange peel
3. Characteristic sprayed foam surface texture:
pop corn
4. Characteristic sprayed foam surface texture:
tree bark
5. Typical self-adhesive force applicator
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