Hello everyone, I have bought myself a house from '46, at a really good price, the house is more or less in original condition. Now that I'm going to start renovating, I was thinking like this... It doesn't leak a lot of heat except at the windows, of course. All the walls will be clad with plasterboard and the windows will be taken down and the innermost glass replaced with insulating glass. I feel that I don't want to put energy into interior additional insulation... Do you think I'm making a mistake? The facade is otherwise plastered, in good condition, and the house is 1 1/2 with a basement.