ᐅ Which wall assembly is suitable for being vapor-permeable?
Created on: 15 Mar 2021 12:34
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Hausbauer2021
Hello everyone,
I am currently researching wall construction with a focus on vapor-open systems. I am very concerned about mold growth in the house, which is why I have often read that a vapor-open build is preferable (using a vapor retarder instead of a vapor barrier). However, when I look at the wall constructions of various manufacturers, a vapor barrier is often installed rather than a retarder (for example, Danwood). If the mechanical ventilation system fails, does this then inevitably lead to mold growth? Can anyone share their experience with how this (PE foil) actually performs in a house? Are there wall constructions where a mechanical ventilation system is installed as a nice-to-have but not essential? We currently live in an apartment and have to air the rooms multiple times in winter to prevent mold from forming under the blinds’ boxes. Are there houses or walls that do not experience these problems? We definitely want a ventilation system, but I would like to avoid the worry of mold growth within a few days if the system fails.
Thank you very much for your experiences.
I am currently researching wall construction with a focus on vapor-open systems. I am very concerned about mold growth in the house, which is why I have often read that a vapor-open build is preferable (using a vapor retarder instead of a vapor barrier). However, when I look at the wall constructions of various manufacturers, a vapor barrier is often installed rather than a retarder (for example, Danwood). If the mechanical ventilation system fails, does this then inevitably lead to mold growth? Can anyone share their experience with how this (PE foil) actually performs in a house? Are there wall constructions where a mechanical ventilation system is installed as a nice-to-have but not essential? We currently live in an apartment and have to air the rooms multiple times in winter to prevent mold from forming under the blinds’ boxes. Are there houses or walls that do not experience these problems? We definitely want a ventilation system, but I would like to avoid the worry of mold growth within a few days if the system fails.
Thank you very much for your experiences.
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nordanney25 Mar 2021 20:1411ant schrieb:
The process of heat recovery is technically much less efficient when implemented in individual-room mini controlled ventilation units; I’m not even sure if manufacturers don’t see it that way themselves and only offer heat recovery with central systems.Then your technical knowledge is not up to date. Decentralized ventilation systems now mostly include heat recovery. The one I am installing (out of necessity, since central systems are not so easy during renovation) features heat recovery (90% heat recovery efficiency and therefore also eligible for KfW funding). It also includes a humidity sensor, light sensor, and is networked internally as well as connected to the differential pressure sensor at the chimney.
nordanney schrieb:
Then you are technically not up to date. Decentralized ventilation systems nowadays mostly include heat recovery.I am indeed surprised and would not have expected significant demand based on efficiency. This is not my area of expertise—as you know, I openly belong to the “don’t-need-it” group when it comes to controlled residential ventilation.nordanney schrieb:
and networked with each otherIn terms of electronic smartness, perhaps, but decentralized systems are not designed for centrally managed operation with a shared air volume.https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
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Chris_Colt25 Mar 2021 23:34Nordlys schrieb:
My window rebate vents have solar-powered heat recovery, especially those on the south side where the sun shines brightly. Quick side question:
Where can you buy the white bench?
11ant schrieb:
As you know, I openly belong to the "don't-need-it" group when it comes to controlled residential ventilation.Or maybe rather to the "haven't-heard-of-it" group?
The realization comes no later than when making a direct comparison.
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nordanney26 Mar 2021 08:2111ant schrieb:
This is not really my area of expertise—as you know, I openly consider controlled residential ventilation as something I don’t really need. That’s not a problem. Now you’ve learned something new again 😉
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