Approved Document C: Site preparation and resistance to contaminants and moisture

Approved Document C of the Building Regulations covers site preparation and resistance to contaminants and moisture.

This document is the 2013 edition, based on the original 2004 edition and incorporating amendments made in 2010 and 2013.

Main changes made by the 2013 admendments:

• Guidance on radon protective measures
• References to British Standards design standards
• Contaminated land guidance, including removal of Annex A
• Materials and workmanship