ᐅ Old house built with Ytong blocks – insulation?

Hello everyone,

we are planning to buy a house that was built in 1974. The exterior walls are made of Ytong and are 30cm (12 inches) thick. Unfortunately, the density of the Ytong is not known, as the original builder has since passed away.

Now for the question: Is additional external insulation necessary or advisable here? Or is it not possible to say this in general?

Thank you very much in advance!
Best regards

Hello,

Stone schrieb:

Now to the question: Is additional exterior insulation necessary or useful here? Or is it not possible to say that in general?

What does the energy certificate say? It should give you an initial assessment 😉

Regards, Bauexperte

Hm... The energy certificate is not available. Is it mandatory?

Nowadays, when selling or renting:
http://de.wikipedia.org/wiki/Energieausweis