I visited a house in 1970 and I wonder about the insulation of the time knowing that it is a house with basement. The ground floor / basement is stone and the top of the house in blocks. The real estate agent is unable to tell us more. Then, water appears on the pipes of the ceiling in the basement. Can you please, tell me more?
Standards in those years were very restrictive, especially in terms of insulation. Before signing any compromise, you must be in possession of complete real estate diagnostics. Among these must appear the "thermal diagnosis" (in fact the diagnosis of "energy performance" of the house or DPE) which has a double classification, from A to G (A being the ideal), one for the conventional consumption of energy housing for heating and sanitary water, the other for its CO2 emissions. The purpose of this diagnosis is to highlight areas for improvement and to prioritize the work to be undertaken. The diagnostician is obliged to make a certain number of recommendations intended to limit the energy losses of the property, without any obligation. It's up to you to decide then, if what he advocates is financially feasible or not. It can also be an argument for discussing the price of the good.
As for the water you see on the underground pipes, it only results from condensation on the cold water pipes. This is regulated by better ventilation of the basement and insulation of the pipes.
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