ᐅ Delayed heating schedule for screed drying problematic?

Created on: 6 Oct 2017 16:46
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lars-steina
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lars-steina
6 Oct 2017 16:46
Hello everyone,

The drying program for the screed was originally supposed to start on Wednesday. However, since the electrician has not yet installed the distribution board and the meter, the air-to-water heat pump cannot be put into operation. Stiebel Eltron does not allow a connection to the temporary construction power supply. Because of this, the drying program is delayed by about one week. My contractor advised me to set up electric heaters as a temporary solution to keep the building heated. He said that every day without heating is harmful to the construction. He also mentioned that the screed dries from the top down and moisture trapped in the lower layers cannot escape upward.

Two architect friends told me that these heaters are not necessary and that the delay is not a big deal—just that I would be able to move in a week later, which is not a problem for me. Oh, and I have been running dehumidifiers for the past two weeks, which also generate a little heat.

Could this delay cause any problems later on (such as mold or damage to the screed)?

I would appreciate hearing your opinions. Thanks and best regards.
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dohuli
6 Oct 2017 17:33
Just an opinion: The architects are right; the building surveyor is talking nonsense. One screed dries to value X in three weeks, another takes only two weeks, and the third four weeks.
Or put differently: If these three weeks after installation were supposed to be based on a certain degree of dryness, then the moisture level should be measured in every screed before heating.
Therefore, my conclusion is that whether it’s 21, 25, or 28 days, it probably doesn’t matter.

If I am completely wrong, I would appreciate an explanation—preferably a technical one.
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Nordlys
6 Oct 2017 19:38
So, why the screed gets damaged when there is no heating is beyond me. Screed has existed since around 1920, and back then houses had stoves and no one heated during the construction phase. The architects are right, your building surveyor is not. Karsten
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lars-steina
6 Oct 2017 19:46
Well, he told me that the screed on top is drying out too quickly, which prevents the moisture from escaping from the lower layers of the screed.
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Nordlys
6 Oct 2017 20:06
What if you were to build with radiators instead of underfloor heating?
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Alex85
6 Oct 2017 20:37
Then his screed would be lower, and he wouldn’t have a heated screed either. A poor comparison. Just like the one from 1920.
@KlaRa can you help?