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Housing: Thermal Insulation

Volume 478: debated on Thursday 26 June 2008

To ask the Secretary of State for Communities and Local Government what research her Department has evaluated on the effect of installation of cavity wall insulation on dampness in buildings. (212602)

The Government have conducted research on the subject of driving rain and damp penetration through cavity walls and this work was published within Building Research Establishment (BRE) Digest 127—‘Index of exposure to driving rain’, and the BRE booklet—‘Rain penetration of cavity walls: report of a survey of properties in England and Wales’.

This research formed part of the evidence which led to the development and revision of two relevant British Standards; BS 8208 Part 1:1985 ‘Guide to assessment of suitability of external cavity walls for filling with thermal insulation’, and BS 8104: 1992—‘Code of practice for assessing exposure of walls to wind-driven rain’. A simplified version of these British Standards is incorporated within Building Regulations Approved Document Part C—‘Site preparation and resistance to contaminants and moisture’.