If Solar cells are used at the exterior unused portion of building walls then it may help to absorb energy. Though it may affect the view of the building.

I would like to see compulsory RADON gas testing before any more insulation works are carried out in Poland and Ukraine

There is a lot of money around for heat insulation in Ukraine South West has very high RADON levels in our opinion. We can see what happened in Poland with high cancer and leukemia among younger children

I am all for insulation but first lets make sure we don't put a whole nation of children at risk from cancer simply because we think we are doing good

Having robust, enforceable and minimum standards to which buildings are monitored is surely the first step. With that background data, improvements against minimum standards can then be assessed and prioritized.

One such program is the NABERS performance evaluation criteria.

http://www.nabers.gov.au/public/WebPages/Home.aspx

In Switzerland, heating of buildings used a very large part of the energry use before the first oil crisis. Therefore, standards were published since 1980 in Switzerland to improve the thermal insulation of the building envelope, and these standards were progressively enforced by laws in all Swiss states. Reglementation was also edicted on the efficiency of boilers and periodical inspection, to improve the outdoor air quality, and this had an important effect on energy use. Indeed, the energy use for heating remains constant in Switzerland since the seventies, and is even now decreasing, despite the strong increase in the building stock. The maximum allowed annual final energy use for heating a new building decreased from about 200 kWh/m² floor area in the seventies down to 50 kWh/m² . This limit applies to all new buildings and also (with some tolerance) to refurbished buildings.

In adition, the Minergie (R) label is given to buildings designed to use less than 40 kWh/m² for heating, cooling, hot water and ventilation. To compute this figure, the use of electricity is multiplied by 2. There are now more than 30'000 labelled buildings.

In 2009, the SIA (Swiss society of architects and engineers, in charge of publishing standards on buildings), published a pre-standard on the way to give an energy label to buildigns, in accordance with EN 15217. This method, which takes into account the primary energy use for all end uses in buildings, is now used by the Swiss states, and could be made mandatory in a near future for sold or rented residential buildings.