bernie
2018-11-25 20:04:08
- #1
....one must consequently use a vapor retarder and be extremely careful to ensure that it is correctly connected.
However, if a vapor retarder is supposedly already included in the product, the homeowner does not need to worry about using another vapor retarder and correctly connecting it to the insulation...
In addition, the product requested here – as well as other diffusionsoffenen products (like the one from STO) – does not contain an integrated barrier layer. During installation, it must be ensured that there are no gaps between the insulation product and the cold outer wall (this can be achieved with special adhesives) and that no barrier layers such as unsuitable plaster and "airtight" wall paint are applied. For optimal moisture regulation, a clay plaster is recommended, for example. Therefore, your argument (quote: the warm room air cools at this point between the insulation and the outer wall, leading to condensation) for an additional vapor barrier is invalid.
Minimal water condensation can dry inward through the diffusion-open insulation; calculation tools are available to determine up to what extent this works without problems.
However, if a vapor retarder is supposedly already included in the product, the homeowner does not need to worry about using another vapor retarder and correctly connecting it to the insulation...
In addition, the product requested here – as well as other diffusionsoffenen products (like the one from STO) – does not contain an integrated barrier layer. During installation, it must be ensured that there are no gaps between the insulation product and the cold outer wall (this can be achieved with special adhesives) and that no barrier layers such as unsuitable plaster and "airtight" wall paint are applied. For optimal moisture regulation, a clay plaster is recommended, for example. Therefore, your argument (quote: the warm room air cools at this point between the insulation and the outer wall, leading to condensation) for an additional vapor barrier is invalid.
Minimal water condensation can dry inward through the diffusion-open insulation; calculation tools are available to determine up to what extent this works without problems.
[*]without barrier materials, the indoor climate and moisture transport between inside and outside are regulated in a natural physical manner