Indy49 said:
Moreover, I can not say that my parents are rich, they did the insulation themselves (so did not benefit from tax credit), but it is still profitable in 3 years.
Certainly, and as for me, I carried out myself, with the agreement of my owner the insulation of the loft with materials of recovery.
But, I'm talking about the real poor: changing the windows of a house it still costs between 7000 and 20000 euros and is not within the reach of some, who do not even have access to credit (part-time workers) , pensioners, isolated smicards, unemployed).
Same thing for tenants: will you convince the owner of one or two houses (often an undivided inheritance of heirs) to invest similar amounts for your thermal and financial comfort, to see? They will prefer to allow you to break the lease! Already for some owners, changing a boiler at the end of life is difficult.
It must be said that many families earn just what it takes to live and have no savings: these are the ones to whom the gas / fuel bill hurts!
Governments are far too likely to think as if the standard household earns 2300 + 1500 euros / net month net. Even that is limited to send his children to the univ '
Of course, to clear the attic boards to put 18 cm of insulation is much easier and within reach of all, but not enough, as long as the house is not waterproof and double glazing.