chef1568
2016-09-24 10:23:25
- #1
Proposal Isover, U=0.197

Hello everyone,
I recently purchased a house from 1963 and now want to insulate the roof structure. (currently no insulation, only plastered bamboo mats)
The roof construction consists of rafters measuring 130x100mm, with a cross battens and concrete tiles on top.
Step 1: (currently -> goal: Energy Saving Ordinance)
- Insulation between rafters
- Insulation below rafters
- Interior drywall
Step 2: (in 3 years)
- Insulation above rafters (alternative to roof sheathing)
- Replacement of roof tiles
Current limitations:
- Due to the ceiling height in the 1st floor living area, rafter doubling is not possible (length of roof slope: 2.20m)
- In the attic, rafter doubling would generally be possible (length of attic beam to ridge: 3.10m)
- Thus, insulation between rafters max. 120mm with 10mm ventilation gap to cross battens/tiles
Current questions:
- I have planned ISOVER as insulation material according to the manufacturer's proposal - are there alternatives? (better, cheaper)
- Does anyone have experience with the variable vapor barrier "ISOVER Vario KM Duplex UV"? Alternatives? (better, cheaper)
- Can the insulation below rafters also be done with Styrofoam? Reason: cheaper and easier to install
I have already planned the setup on u-wert.net as described above - what do you think about it?
Thank you very much in advance for your effort,
Feder
Hello everyone,
I recently purchased a house from 1963 and now want to insulate the roof structure. (currently no insulation, only plastered bamboo mats)
The roof construction consists of rafters measuring 130x100mm, with a cross battens and concrete tiles on top.
Step 1: (currently -> goal: Energy Saving Ordinance)
- Insulation between rafters
- Insulation below rafters
- Interior drywall
Step 2: (in 3 years)
- Insulation above rafters (alternative to roof sheathing)
- Replacement of roof tiles
Current limitations:
- Due to the ceiling height in the 1st floor living area, rafter doubling is not possible (length of roof slope: 2.20m)
- In the attic, rafter doubling would generally be possible (length of attic beam to ridge: 3.10m)
- Thus, insulation between rafters max. 120mm with 10mm ventilation gap to cross battens/tiles
Current questions:
- I have planned ISOVER as insulation material according to the manufacturer's proposal - are there alternatives? (better, cheaper)
- Does anyone have experience with the variable vapor barrier "ISOVER Vario KM Duplex UV"? Alternatives? (better, cheaper)
- Can the insulation below rafters also be done with Styrofoam? Reason: cheaper and easier to install
I have already planned the setup on u-wert.net as described above - what do you think about it?
Thank you very much in advance for your effort,
Feder