Friday, 17 August 2018

Friday, 17 August 2018

Radon – a new diagnostic report

Very recently, the purchase of a property in France has had yet another diagnostic report added to the lengthening list.

This time it is called E.R.P (Etat des Risques et Pollutions) regarding Radon, to replace ESRIS (État des Servitudes 'Risques' et d'Information sur les Sols).

Quite a large part of France is potentially impacted. The map below gives a general overview.

Within the zones highlighted, there are areas where there are volcanic or granite areas, plus some sandstone areas which can be affected. 

The degree of Radon could be very localised, and can vary significantly even within a small commune.
Radon is everywhere, as it is formed from the uranium in all rocks and soils. Outdoors everywhere and indoors in many areas the radon levels are low and the risk to health is small. The darker the colour on the Radon maps the greater the chance of a high radon level in a building. However not all buildings, even in the darkest areas, have high levels.
If you have a home in a Radon risk area, then you can undertake significant work to improve your rating. The aim of remedial work is to reduce radon levels as low as possible. There are several methods that can be used to reduce high radon levels.

Some simple actions such as sealing around loft-hatches, sealing large openings in floors and extra ventilation do not reduce radon levels on their own. When combined with other effective measures, they can improve the reduction of radon levels. Completely sealing floors is difficult and can cause rot in wooden floors.

Below is a map of the UK, identifying areas affected by Radon

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