ᐅ Insulation with batt or panel materials, floor/ceiling between stories, freeze-thaw cycles, membrane materials?
Created on: 20 Sep 2012 16:28
A
altbauarndtA
altbauarndt20 Sep 2012 16:28Hello everyone,
I have a very important question for us and unfortunately received various answers on site.
I would like to insulate our roof or the top floor ceiling.
Our house is a classic “coffee grinder” style from 1937 with a hipped roof, meaning it has four almost equal roof surfaces. The roof structure (see sketch) is as follows: roof beams, roofing felt (partially coated with bitumen on the inside), in other areas a foil, battens, and then concrete tiles.
The special feature is that the attic space was practically hung into the roof like a box.
I can access one and a half roof surfaces directly as well as the entire loft; the others can only be insulated from the loft area by stuffing insulation in. The attic was constructed with plasterboard, which was nailed to a stud framework or directly to the roof beams. The floor in the loft partly consists of plasterboard and partly of a wooden paneling (pine) when viewed from above.
The insulation goal as the optimum solution: friction-fit insulation between the beams or just insulating the “top floor ceiling.”
Now to my questions:
1. Can I seal the holes in the roofing felt and install friction-fit insulation? Or can I stuff insulation in from above (here, of course, I don’t know the condition of the roofing felt behind it)?
2. If I only insulate the top floor ceiling, what should I do? Put a foil on and then insulation wool? What about the gaps at the edges that extend downwards? Should I just stuff them so there is no draft? Could condensation form here?
I’m simply a bit worried that the roof structure might rot away. Insulation is necessary, however, since everything froze up there last year, including my computer’s LCD ;-)
I would be very grateful for any answers and support!!!
Best regards
Arndt
I have a very important question for us and unfortunately received various answers on site.
I would like to insulate our roof or the top floor ceiling.
Our house is a classic “coffee grinder” style from 1937 with a hipped roof, meaning it has four almost equal roof surfaces. The roof structure (see sketch) is as follows: roof beams, roofing felt (partially coated with bitumen on the inside), in other areas a foil, battens, and then concrete tiles.
The special feature is that the attic space was practically hung into the roof like a box.
I can access one and a half roof surfaces directly as well as the entire loft; the others can only be insulated from the loft area by stuffing insulation in. The attic was constructed with plasterboard, which was nailed to a stud framework or directly to the roof beams. The floor in the loft partly consists of plasterboard and partly of a wooden paneling (pine) when viewed from above.
The insulation goal as the optimum solution: friction-fit insulation between the beams or just insulating the “top floor ceiling.”
Now to my questions:
1. Can I seal the holes in the roofing felt and install friction-fit insulation? Or can I stuff insulation in from above (here, of course, I don’t know the condition of the roofing felt behind it)?
2. If I only insulate the top floor ceiling, what should I do? Put a foil on and then insulation wool? What about the gaps at the edges that extend downwards? Should I just stuff them so there is no draft? Could condensation form here?
I’m simply a bit worried that the roof structure might rot away. Insulation is necessary, however, since everything froze up there last year, including my computer’s LCD ;-)
I would be very grateful for any answers and support!!!
Best regards
Arndt
Hello,
have you ever considered completely redoing the roof? Everything sounds rather temporary and unprofessionally put together.
If the roof is covered with roofing felt, you should not install insulation directly against it. Roofing felt is relatively airtight, which most likely will cause mold problems. The best approach is to insulate the ceiling of the upper floor and install a vapor barrier on the heated side. If you want to insulate the attic space, you definitely need to ensure proper ventilation.
Regards
have you ever considered completely redoing the roof? Everything sounds rather temporary and unprofessionally put together.
If the roof is covered with roofing felt, you should not install insulation directly against it. Roofing felt is relatively airtight, which most likely will cause mold problems. The best approach is to insulate the ceiling of the upper floor and install a vapor barrier on the heated side. If you want to insulate the attic space, you definitely need to ensure proper ventilation.
Regards
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