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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StefanPoe
Hello,
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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StefanPoe5 Jun 2016 12:19Thanks for the answers!!
Yes, I am already informed about heating out. Thanks.
I thought that the brick alone would allow some moisture to be released to the outside (if there is no vapor barrier on it). Ok, so spring wouldn’t be a bad time for the interior plaster!
Do dehumidifiers make sense in your opinion? Or is ventilation alone enough?
Yes, I am already informed about heating out. Thanks.
I thought that the brick alone would allow some moisture to be released to the outside (if there is no vapor barrier on it). Ok, so spring wouldn’t be a bad time for the interior plaster!
Do dehumidifiers make sense in your opinion? Or is ventilation alone enough?
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toxicmolotof5 Jun 2016 12:22We relied entirely on natural ventilation, but took a total of four months to complete the ventilation process.
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StefanPoe5 Jun 2016 12:26OK, 4 months after applying the interior plaster and screed, right? - during that time, there should be enough.
We are also planning a mechanical ventilation system – this would also achieve the effect of airing out, correct?
We are also planning a mechanical ventilation system – this would also achieve the effect of airing out, correct?
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toxicmolotof5 Jun 2016 12:34That would be bad if it weren’t.
Plastering was done in mid-January, screed at the end of February, with electrical and heating installations in between. Tiling and painting took place from the end of April into May. Move-in is scheduled for the end of May.
At least 4 times a day, preferably 6-8 times a day, ventilation is necessary.
The mechanical ventilation system only takes over this part once it is operational.
Plastering was done in mid-January, screed at the end of February, with electrical and heating installations in between. Tiling and painting took place from the end of April into May. Move-in is scheduled for the end of May.
At least 4 times a day, preferably 6-8 times a day, ventilation is necessary.
The mechanical ventilation system only takes over this part once it is operational.
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Peanuts7414 Jun 2016 08:47toxicmolotow schrieb:
Constantly ventilating isn’t necessarily effective ventilation. You should ventilate several times a day, specifically whenever the actual moisture content (not relative humidity) inside is higher than outside.
Have you considered the screed? If you use rapid heating, you could keep chimpanzees and tropical frogs inside.
By the way, summer isn’t necessarily the best time for drying. Early spring, when it’s still cold/cool, is better.
And yes, ventilating 6 to 8 times a day is sufficient.Nowadays, when can you really rely on the weather? Generally, that might be true, but hoping for a cool and dry spring might mean waiting for years.
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toxicmolotof14 Jun 2016 09:03Peanuts74 schrieb:
When can you really rely on the weather these days?
That might generally be true, but hoping for a cool and dry spring? You might be waiting for years for that. If you plan your house construction so that a delay of 2 or 4 weeks throws you off track, you might as well not start at all.
Always rushing, never patient.
By the way, the spring seasons over the last 5 years were always wonderful.
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