Part C1 - Site preparation and Part C2 - Moisture resistance

Information can be viewed in Building Regulations 2000 - Approved Document C - Site Preparation and Moisture Resistance (1326 KB) or is available from the Communities and Local Government website (external link).

There are five requirements to this part:

1. that before building works start all vegetation and topsoil be removed;
2. that any contaminated ground is either treated or neutralised or removed before a building is erected;
3. that subsoil drainage is provided to waterlogged sites;
4. that the roof, walls, and floor be adequately weatherproofed against damp and rain penetration.
5. Roofs need to be well vented or designed to prevent moist air causing condensation damage.
   

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