This document provides an overview of the energy technology and R & D collaboration programme established by the International Energy Agency to facilitate co-operation among IEA member and non-member countries to develop new and improved energy technologies and introduce them into a market. The collaboration programme aims to bring together experts on specific technologies wishing to work on common problems and to share the results of their endeavors.

Radon can enter a new extension or conservatory by a number of routes, with the result that radon levels may also increase inside the existing house. This leaflet describes how to minimise  the amount of radon entering the new building, and discusses the additional protective measures it may be necessary to install during its construction. It will be of interest to anyone involved in reducing indoor radon levels.