Achenbach prefab house 1980 uninsulated - insulation costs

Concerning wood preservatives were hardly used anymore around 1980, and if they were, the problem would probably be largely solved by the energy-efficient renovation. There are many companies that specialize in renovating prefab houses. With 50,000 euros, you should be very well off.

Best regards

Thank you very much for all the informative, helpful answers and tips, over the weekend we will visit the house for the second time, this time more intensively, measure important distances and then we will decide..... Claudia