Do you know your damp proof courses from your damp proof membrane? Our Chartered Surveyor explains all

A modern extension on the back of a victorian house
(Image credit: Veronica Rodriguez)

Strike up a conversation with a builder or surveyor and the acronym ‘DPC’ will probably crop up before too long. There seems to be an unwritten assumption that everyone and their dog understands what 'damp proof courses' are.  

Yet DPCs are a potentially controversial topic, not least because vast sums of money have been wasted retrofitting poor quality injected DPCs in older homes.

Ian Rock

Chartered surveyor Ian Rock MRICS is a director is and the author of eight popular Haynes House Manuals, including the Home Extension Manual, the Self Build Manual and Period Property Manual.

Ian is also the founder of Zennor Consultants. In addition to providing house surveys, Zennor Consultants provide professional guidance on property refurbishment and maintenance as well as advising on the design and construction of home extensions and loft conversions, including planning and Building Regulations compliance.

Ian has recently added a 100m2 extension to his home; he designed and project managed the build and completed much of the interior fit-out on a DIY basis.