Klweber
2011-03-11 21:27:20
- #1
Hello, we have recently become homeowners; it is a two-family house built in 1966, 17.5 cm sand-lime brick masonry, 150 sqm.
Currently, heating is done via a central oil heating system with small stoves.
The plan is to install a heating system with radiators (oil condensing boiler) and then insulate the house (including the roof and basement, the windows are new).
Initially, insulation of 14 cm with 0.35 was planned, but since this is difficult to implement due to the roof overhang and other structural conditions, I was advised to use 12 cm with 0.32.
The interior rooms are all covered with drywall and Styrofoam behind it, totaling 8 cm (walls and ceilings); I cannot yet say whether there is a vapor barrier or a cavity behind it, but during the heating works, the wall will have to be opened anyway.
This was already done during the construction phase, according to the seller!
Now my questions:
Does external insulation still make sense in this case?
If yes, is the proposed insulation OK?
How much savings can be expected from the external insulation?
Currently, heating is done via a central oil heating system with small stoves.
The plan is to install a heating system with radiators (oil condensing boiler) and then insulate the house (including the roof and basement, the windows are new).
Initially, insulation of 14 cm with 0.35 was planned, but since this is difficult to implement due to the roof overhang and other structural conditions, I was advised to use 12 cm with 0.32.
The interior rooms are all covered with drywall and Styrofoam behind it, totaling 8 cm (walls and ceilings); I cannot yet say whether there is a vapor barrier or a cavity behind it, but during the heating works, the wall will have to be opened anyway.
This was already done during the construction phase, according to the seller!
Now my questions:
Does external insulation still make sense in this case?
If yes, is the proposed insulation OK?
How much savings can be expected from the external insulation?