[poseva]

1. I would start by lowering the ceiling and insulating it. For ceiling if you insulate it using mineral wool, or glass wool... the vapor barrier [0] is critical and must be placed continuously on the warm part. Also this membrane (preferably containing aluminum so that you get back some of the heat) must be glued to the walls using special glue [1]

2. I would change the windows, with at least triple pane. The windows must be mounted correctly (see RAL montage) and also must be placed aligned with the outside face of the wall.

3. I would take out the floor, and do hydronic underfloor heating with EPS150 or XPS as insulation substrate.

[0] https://www.rothoblaas.com/products/airtightness-and-waterpr...

[1] https://www.rothoblaas.com/products/airtightness-and-waterpr...

[johndhi]

Thank you!

what price do you think we're looking at for each of these? lowering the ceiling is a bit of a bummer from a looks perspective. underfloor heating sounds wonderful.

[poseva]

You're welcome! I live in Europe (Romania) and to be honest I would not know what to expect in terms of costs. You lose at least 25% of your energy trough the roof, this can even go up to 30-35% if the ceiling is cracked or air is able to circulate freely trough it.