ᐅ Moisture issue with interior plaster after installing external insulation using ventilated rainscreen system
Created on: 5 Jun 2016 11:28
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StefanPoeS
StefanPoe5 Jun 2016 11:28Hello,
we are currently working on a rough construction site schedule and have come across a question.
We plan to insulate the exterior facade with 25cm (10 inches) ETICS (classic polystyrene boards) immediately after completing the exterior walls, roof, and window installation. (The advantage is that we only need to set up scaffolding once, and we avoid issues with drying times during winter.)
Now to my question:
If we plaster the interior walls afterward, will the moisture introduced during this process still be able to escape effectively if the external thermal insulation is already installed on the exterior wall? The same applies to the screed applied afterward.
Thank you very much for your information and answers.
Best regards,
Stefan
we are currently working on a rough construction site schedule and have come across a question.
We plan to insulate the exterior facade with 25cm (10 inches) ETICS (classic polystyrene boards) immediately after completing the exterior walls, roof, and window installation. (The advantage is that we only need to set up scaffolding once, and we avoid issues with drying times during winter.)
Now to my question:
If we plaster the interior walls afterward, will the moisture introduced during this process still be able to escape effectively if the external thermal insulation is already installed on the exterior wall? The same applies to the screed applied afterward.
Thank you very much for your information and answers.
Best regards,
Stefan
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toxicmolotof5 Jun 2016 11:36And what about humidity inside and outside.
My recommendation: ventilate properly, ventilate, and ventilate again. Both during the construction phase and afterwards (if no mechanical system takes over).
My recommendation: ventilate properly, ventilate, and ventilate again. Both during the construction phase and afterwards (if no mechanical system takes over).
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StefanPoe5 Jun 2016 11:38The plan is to apply the exterior wall insulation system (VWS) between early October and early November this year, and then probably plaster the interior walls between spring and summer.
Is constant ventilation sufficient to manage moisture from the inside (i.e., interior plaster) that cannot escape to the outside through the exterior wall insulation system?
Is constant ventilation sufficient to manage moisture from the inside (i.e., interior plaster) that cannot escape to the outside through the exterior wall insulation system?
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toxicmolotof5 Jun 2016 11:43Constant ventilation is not necessarily effective. Ventilate several times a day, specifically whenever the actual moisture content (not relative humidity) inside is higher than outside.
Have you considered the screed? When using rapid drying heating, you could keep chimpanzees and tropical frogs inside.
By the way, summer is not necessarily the best time for drying. Early spring, when it is still cold or cool, is better.
And yes, ventilating 6-8 times a day is sufficient.
Have you considered the screed? When using rapid drying heating, you could keep chimpanzees and tropical frogs inside.
By the way, summer is not necessarily the best time for drying. Early spring, when it is still cold or cool, is better.
And yes, ventilating 6-8 times a day is sufficient.
StefanPoe schrieb:
Moisture from the inside (meaning the interior plaster) that cannot escape to the outside due to the external thermal insulation composite system (ETICS) – is constant ventilation enough in this case?Even without ETICS, moisture cannot escape through the walls. The only solution is heating and ventilating, and as already mentioned, preferably not in summer.
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