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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alterego13426 Mar 2021 09:15nordanney schrieb:
What is this? I wasn’t aware of it being integrated with heat recovery. The heat exchanger and related components take up quite a bit of space. I only know of decentralized systems with ventilation openings on the exterior reveal.
I think we’re talking about the same type of decentralized ventilation. I believe I’m not allowed to mention manufacturers (?), but almost all major window manufacturers offer decentralized ventilation systems integrated into the window or the reveal. The airflow capacity might vary, but at least the facade isn’t compromised visually 🙂
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nordanney26 Mar 2021 09:30alterego134 schrieb:
I think we are talking about the same type of decentralized ventilation. I don’t think I’m allowed to name manufacturers (?), but almost all major window manufacturers offer a decentralized ventilation system installed within the window or the reveal. How much airflow they provide is another question, but at least the facade is not disfigured. Feel free to name the provider – that’s not prohibited.
I’m still not completely clear on what exactly you mean. I googled and only found Endura Twist and Sigenia, which have a ventilation system integrated into the window (or installed transversely beneath the windowsill) with heat recovery in the window rebate. Although technically, it’s not really a ventilation system in the rebate. The specified values are not very convincing (only 62% heat recovery with Sigenia, and a noise level of 44 dB).
Otherwise, the classic decentralized units have their outdoor opening in the reveal—but not inside the window itself.
What exactly do you mean?
guckuck2 schrieb:
Or maybe more for the "I don't know" group? Experts know it, users need it, others drop out.
nordanney schrieb:
It’s not a big deal. Now you’ve learned something new again. Yes, I gladly belong to the group that keeps learning – which doesn’t mean I then buy the products I learn about. In that respect, I follow @Nordlys’s approach: "simple rugged reliable."
guckuck2 schrieb:
The awakening comes at the latest with a direct comparison. That can definitely be ruled out: I’m not going to build the same house twice or combine central and decentralized controlled mechanical ventilation systems in one house just to be able to make that comparison.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
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alterego13426 Mar 2021 22:20nordanney schrieb:
Feel free to name the supplier – it’s not prohibited.
I’m not entirely sure what you mean. I looked it up and only found Endura Twist and Sigenia, which install a window rebate ventilation system with heat recovery inside the window (or installed horizontally under the windowsill). Although technically it’s not really a window rebate ventilation. However, the stated values are not very convincing (only 62% heat recovery with Sigenia, and a noise level of 44dB).
Otherwise, there are the classic decentralized units with the exterior opening placed in the reveal, but not in the window itself.
What exactly do you mean?For example, the Geneo Inovent system from Rehau. The performance isn’t impressive either—71% heat recovery at 42dB—but it’s discreet and might not be a bad idea as part of an overall ventilation concept. I’ve never seen it in action, nor do I know anyone who has installed this or a similar system...
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nordanney26 Mar 2021 23:06alterego134 schrieb:
For example, the Geneo Inovent system from Rehau.Thanks! I've never heard of it before.Similar topics