ᐅ Parquet flooring over underfloor heating without a basement – floating installation with a vapor barrier?
Created on: 12 Feb 2023 21:18
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xMisterDx
Hello,
I’m facing a bit of a puzzle.
Everywhere I read, it is generally recommended to fully glue parquet flooring when combined with underfloor heating, even for click-lock parquet.
Now, for the upper floor, I chose laminate flooring with a thickness of 8mm (0.073 m²K/W), and for the living room on the ground floor, parquet flooring from Living by Haro bought at Bauhaus, 11mm thick (0.063 m²K/W). The impact sound insulation for both will be Wineo Soundprotect with 0.01 m²K/W, because:
If I can install laminate flooring as a floating floor, why not also click-lock parquet, which actually has a better thermal resistance?
Am I missing something crucial?
Below the screed on the ground floor, there is 8cm (3 inches) of insulation, underneath a bitumen membrane laid over the entire surface, and then the concrete slab.
Do I need a vapor barrier, or in other words, can it cause any issues if I install a vapor barrier?
Should I use a vapor barrier on the upper floor as well?
Since moisture can escape through the underside there, wouldn’t a vapor barrier also cause no harm?
Thanks for your help!
I’m facing a bit of a puzzle.
Everywhere I read, it is generally recommended to fully glue parquet flooring when combined with underfloor heating, even for click-lock parquet.
Now, for the upper floor, I chose laminate flooring with a thickness of 8mm (0.073 m²K/W), and for the living room on the ground floor, parquet flooring from Living by Haro bought at Bauhaus, 11mm thick (0.063 m²K/W). The impact sound insulation for both will be Wineo Soundprotect with 0.01 m²K/W, because:
If I can install laminate flooring as a floating floor, why not also click-lock parquet, which actually has a better thermal resistance?
Am I missing something crucial?
Below the screed on the ground floor, there is 8cm (3 inches) of insulation, underneath a bitumen membrane laid over the entire surface, and then the concrete slab.
Do I need a vapor barrier, or in other words, can it cause any issues if I install a vapor barrier?
Should I use a vapor barrier on the upper floor as well?
Since moisture can escape through the underside there, wouldn’t a vapor barrier also cause no harm?
Thanks for your help!
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xMisterDx23 Feb 2023 12:30According to the instructions, the vapor retarder foil should be sealed to the wall to ensure airtightness there as well.
Parquet flooring can be installed either as a "floating" floor [loosely on insulation underlays] or fully glued to the screed.
Laminate flooring panels are designed exclusively for floating installation—and manufacturers explicitly state this in their installation instructions.
A polyethylene (PE) sheet used as a vapor retarder is only recommended for floating installations! Its purpose is to prevent residual moisture contained in any screed mortar from reaching moisture-sensitive floor coverings “if necessary” (detailed explanations would certainly exceed the scope and general interest of this forum).
Also, so-called “impact sound insulation underlays” are used only and exclusively with floating floor panels.
How could this work otherwise with a fully glued installation? (rhetorical question!)
The idea that a PE sheet used in floating installations could somehow negatively affect the floor build-up belongs to the realm of myths.
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Best regards to everyone: KlaRa
Laminate flooring panels are designed exclusively for floating installation—and manufacturers explicitly state this in their installation instructions.
A polyethylene (PE) sheet used as a vapor retarder is only recommended for floating installations! Its purpose is to prevent residual moisture contained in any screed mortar from reaching moisture-sensitive floor coverings “if necessary” (detailed explanations would certainly exceed the scope and general interest of this forum).
Also, so-called “impact sound insulation underlays” are used only and exclusively with floating floor panels.
How could this work otherwise with a fully glued installation? (rhetorical question!)
The idea that a PE sheet used in floating installations could somehow negatively affect the floor build-up belongs to the realm of myths.
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Best regards to everyone: KlaRa
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xMisterDx24 Feb 2023 13:45KlaRa schrieb:
Their function is to prevent the residual moisture contained in every screed mortar—“just in case” (providing more details would certainly exceed the scope of this discussion and the readers’ capacity and willingness to absorb such information)—from reaching moisture-sensitive surface coverings. I would actually be interested to know, do you think my ability to absorb this as an electrical engineer (university of applied sciences) would be sufficient? 🙂
xMisterDx schrieb:
I’m actually curious—do you think my capacity to learn as an electrical engineer (university of applied sciences) is sufficient for this? 🙂I am happy to provide professional answers to serious questions.X
xMisterDx25 Feb 2023 08:24Well. I now know that a vapor barrier does no harm. However, I still don’t know if I actually need one because I am not familiar with the "worst-case scenario." So, what exactly is this "worst-case scenario"?
Laying out and sealing the foil involves quite a bit of effort. If I can avoid this because the "worst-case scenario" cannot occur in my case or is very unlikely, I would of course prefer to do so.
Laying out and sealing the foil involves quite a bit of effort. If I can avoid this because the "worst-case scenario" cannot occur in my case or is very unlikely, I would of course prefer to do so.
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