Hi,
We had our cement screed installed over 5 weeks ago.
For almost 2.5 weeks now, we have been actively drying our house. The heating curve is already decreasing again.
Unfortunately, we are not able to get the moisture under control. Ventilating more than twice a day is impossible; during the first week, we only managed to ventilate once a day.
Our relative humidity still remains at around 95%.
I wanted to ask how advisable it is to keep two opposite windows slightly open (tilted) on each floor.
Does this make sense, or is it more of a disadvantage?
We had our cement screed installed over 5 weeks ago.
For almost 2.5 weeks now, we have been actively drying our house. The heating curve is already decreasing again.
Unfortunately, we are not able to get the moisture under control. Ventilating more than twice a day is impossible; during the first week, we only managed to ventilate once a day.
Our relative humidity still remains at around 95%.
I wanted to ask how advisable it is to keep two opposite windows slightly open (tilted) on each floor.
Does this make sense, or is it more of a disadvantage?
After 5 weeks, the cement screed should have reached its equilibrium moisture content. This means that significant amounts of water will be stored in your house, which—for example—can affect the ceiling or roof structure by causing moisture in the insulation if it has already been installed. The insulation should dry out as quickly as possible.
It is essential to set up 2-3 condensation dehumidifiers, run them for several days, and empty them daily until a maximum relative humidity of 55%-60% is reached.
Tilted windows are by far not sufficient; rain exposure must also be considered. Last year, on a construction site, moisture damage occurred to drywall partitions because the builder left windows tilted open on the weather-exposed side overnight, and they were heavily rained on.
It is essential to set up 2-3 condensation dehumidifiers, run them for several days, and empty them daily until a maximum relative humidity of 55%-60% is reached.
Tilted windows are by far not sufficient; rain exposure must also be considered. Last year, on a construction site, moisture damage occurred to drywall partitions because the builder left windows tilted open on the weather-exposed side overnight, and they were heavily rained on.
Yes, probably. We plan to place a few dehumidifiers in the rooms no later than after priming the walls and applying the fine plaster on the interior walls.
The mechanical ventilation system with heat recovery would also be ideal for drying, but we were told that it will only be activated at the end of construction when no more building dust is generated.
But basically, airing the rooms by tilting windows even at temperatures below 10°C (50°F) is not harmful to the building structure, right?
The mechanical ventilation system with heat recovery would also be ideal for drying, but we were told that it will only be activated at the end of construction when no more building dust is generated.
But basically, airing the rooms by tilting windows even at temperatures below 10°C (50°F) is not harmful to the building structure, right?
S
Sebastian799 Dec 2015 13:29Tilt-and-turn windows do not provide significant air exchange and can cause drafts in exposed areas.
I would recommend using mechanical ventilation with heat recovery now – equipped with suitable filters and operating at a low speed.
I would recommend using mechanical ventilation with heat recovery now – equipped with suitable filters and operating at a low speed.
Sebastian79 schrieb:
Tilt-and-turn windows do not provide significant air exchange, and you will get drafts in exposed areas.
I would use the mechanical ventilation system now—with appropriate filters installed beforehand and at a low fan speed. Tilted windows actually achieve a higher air exchange rate than mechanical ventilation running on low with additional filters that consume electricity. Also, I think using proper construction dryers is not advisable.
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