This document covers the use of insulating materials in cavity walls and the prevention of toxic fumes entering the building.
The requirements in this edition of Approved Document D are as follows:
D1 – Cavity insulation
If insulating material is inserted into a cavity in a cavity wall reasonable precautions shall be taken to prevent the subsequent permeation of any toxic fumes from that material into any part of the building occupied by people.
Limits on application
None






