Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture·Page 28·6.5
Alternative Moisture Resistance via BS 8215
Resistance to ground moisture passage can alternatively be demonstrated by following relevant recommendations in BS 8215 Clauses 4 and 5.
The requirement to resist the passage of moisture from the ground can also be met by following the relevant recommendations of Clauses 4 and 5 of BS 8215.
Source — /Users/richardhill/Documents/planning-arch-project/data/documents/regional/Technical Booklet C - Site Preparation and Resistance to Contaminants and Moisture.pdf