BS 8221-1:2000

Committees responsible
Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
4 Considerations affecting external cleaning decisions
5 Stonework
6 Clay and calcium silicate brickwork
7 Terracotta and faience
8 Concrete
9 Removal of specific deposits
10 Cleaning methods
11 Safety
12 Consolidations for porous building materials
Annex A (informative) Precautions for hand cleaning
Annex B (informative) Precautions for water cleaning
Annex C (informative) Precautions with abrasive cleaning
Annex D (informative) Further information on chemical
                      cleaning
Bibliography
Table 1 - Factors affecting choice of cleaning method
Table 2 - Geological groups of rocks and examples of building
          materials
Table 3 - Types of sandstone and their potential resistance
          to weathering and soiling
Table 4 - Sandstone matrices and their potential resistance
          to weathering and soiling
Table 5 - Operating pressures
Table 6 - Hardness of abrasives

Gives guidance on removing or partial removing of deposits from the original surface or substrate for a building. Provides advice on cleaning procedures in use and safe deposits characteristics, and gives guidance on cleaning natural stones, clay and calcium silicate brick, glazed and unglazed terracotta/faience and cast concrete and concrete products, eg cast stone, concrete brick and concrete blockwork.