Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture·Page 39·8.1, 8.2
Interstitial condensation - scope
Regulation 29 on condensation applies only to dwellings. Dwellings must be designed and constructed to avoid harmful effects from interstitial condensation.
Regulation 29 (Condensation) applies only to dwellings. A dwelling should meet the requirement to avoid any harmful effects caused by interstitial condensation if it is designed and constructed in accordance with BS 5250. Guidance is also given in the BRE Report BR 262 Thermal insulation: avoiding risks.
Source — /Users/richardhill/Documents/planning-arch-project/data/documents/regional/Technical Booklet C - Site Preparation and Resistance to Contaminants and Moisture.pdf