Part D - Toxic Substances

Approved Document D

Publication title: Approved Document D - Toxic Substances (1992 edition incorporating 2002, 2010 and 2013 amendments)
Date published: reprinted October 2015


Approved Document D contains guidance on controlling toxic substances used in building works. It focuses on health and safety guidance for using a barrier in a cavity wall to prevent harmful fumes from entering a property due to injecting urea formaldehyde into cavity fill insulation systems.


The Merged Approved Documents

A consolidated version of the individual Approved Documents published by the government, now presented as a single, searchable PDF.

Previous version

This is the current edition of Approved Document D (Toxic Substances). It supersedes the original 1992 edition by incorporating the changes made by amendments in 2002, 2010 and 2013

Changes in this version

This current edition of Approved Document D (Toxic Substances) has been updated and replaces all previous editions.

This Approved Document gives guidance for compliance with the Building Regulations for building work carried out in England. It also applies to building work carried out on excepted energy buildings in Wales as defined in the Welsh Ministers (Transfer of Functions) (No. 2) Order 2009.