ᐅ Replace lightweight aggregate concrete blocks in the roof with insulation between the rafters
Created on: 28 Feb 2024 19:46
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Feelix5Hello,
in our house from 1964, the roof is to be insulated and reroofed. Between the rafters in the upper floor area, there are currently pumice stones, which according to the energy consultant should be removed and replaced with insulation between the rafters for summer heat protection. However, when removing the stones from the outside, it is very likely (according to 2 roofers, the energy consultant, and our own assessment) that the interior plaster on the sloped ceilings of the upper floor will be damaged or fall off (reed mats are used as plaster base).
We now have the following options:
1. Remove the stones directly from the inside ourselves and install panels on the slopes (exact execution would need to be planned if this option is chosen).
+ Advantage: Being able to renovate the rooms inside independently of the roofer’s schedule without fear that material will fall off later, creating dust and dirt.
- Disadvantage: Additional effort, since the slopes would otherwise only need to be repainted or wallpapered.
2. Wait until the roofer removes the stones from the outside (likely in summer) and then assess the extent to which the slopes need to be replastered or covered with panels.
+ Advantage: Currently less effort, no possibly "unnecessary" removal of plaster.
- Disadvantage: Uncertainty and no “completion” of the upper floor before moving in in May.
3. Leave the stones in place and add insulation on top of them (roofer’s recommendation, but the energy consultant still needs to calculate if this is sufficient for summer heat protection and currently recommends removing the stones).
+ Advantage: Least amount of work.
- Disadvantage: Possible heat load due to stones heating up in summer.
I would be interested in opinions and experiences, especially regarding heating of pumice stones in summer (the roof is oriented East/West). Our bed would be placed directly under a sloped ceiling, so heat radiation here in summer would presumably already be quite uncomfortable.
Thank you very much!
in our house from 1964, the roof is to be insulated and reroofed. Between the rafters in the upper floor area, there are currently pumice stones, which according to the energy consultant should be removed and replaced with insulation between the rafters for summer heat protection. However, when removing the stones from the outside, it is very likely (according to 2 roofers, the energy consultant, and our own assessment) that the interior plaster on the sloped ceilings of the upper floor will be damaged or fall off (reed mats are used as plaster base).
We now have the following options:
1. Remove the stones directly from the inside ourselves and install panels on the slopes (exact execution would need to be planned if this option is chosen).
+ Advantage: Being able to renovate the rooms inside independently of the roofer’s schedule without fear that material will fall off later, creating dust and dirt.
- Disadvantage: Additional effort, since the slopes would otherwise only need to be repainted or wallpapered.
2. Wait until the roofer removes the stones from the outside (likely in summer) and then assess the extent to which the slopes need to be replastered or covered with panels.
+ Advantage: Currently less effort, no possibly "unnecessary" removal of plaster.
- Disadvantage: Uncertainty and no “completion” of the upper floor before moving in in May.
3. Leave the stones in place and add insulation on top of them (roofer’s recommendation, but the energy consultant still needs to calculate if this is sufficient for summer heat protection and currently recommends removing the stones).
+ Advantage: Least amount of work.
- Disadvantage: Possible heat load due to stones heating up in summer.
I would be interested in opinions and experiences, especially regarding heating of pumice stones in summer (the roof is oriented East/West). Our bed would be placed directly under a sloped ceiling, so heat radiation here in summer would presumably already be quite uncomfortable.
Thank you very much!
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