Part D - Toxic substances and cavity insulation

Information can be viewed in Building Regulations 2000 - Approved Document D - Toxic Substances (681 KB) or is available from the Communities and Local Government website (external link).

This part requires walls to be constructed in such a way that cavity fill fumes are prevented from penetrating the building.

The documents on this website can be downloaded and are published using Adobe Portable Document Format (PDF). To view or print these documents, Adobe's Acrobat PDF reader is required which can be downloaded from Adobe Systems' website (external link).