ᐅ Drying, Heating, and Ventilation of Screed – Questions
Created on: 5 Jun 2024 21:35
N
NilsHolgersson
Hello everyone,
We are expecting the screed to be installed at the beginning of July (solid construction, semi-detached house, two full floors plus basement).
The plan includes using heating devices/programs for drying, along with dehumidifiers with drainage hoses and fans.
Now, the questions:
1. The sequence: the screed will be poured, then left undisturbed for a few days until it sets, followed by heating.
When should the heating start – immediately after it sets, or should there be a few weeks of conventional drying without any technology first?
2. We thought the dehumidifiers and fans would be used together with the heating (which seems logical, as the heating creates a lot of moisture). However, our site manager said the heating should run first, and only after that the dehumidifiers and fans should be used. He was a bit uncertain and said he would check on it.
3. The construction site is a bit far from our current apartment. Without dehumidifiers or fans, the recommendation is to ventilate twice daily during drying. Can the combination of dehumidifiers and fans replace conventional ventilation? Even if airing out is only needed once every two to three days, that would be a great relief.
Many thanks for your help!
Best regards,
Nils
We are expecting the screed to be installed at the beginning of July (solid construction, semi-detached house, two full floors plus basement).
The plan includes using heating devices/programs for drying, along with dehumidifiers with drainage hoses and fans.
Now, the questions:
1. The sequence: the screed will be poured, then left undisturbed for a few days until it sets, followed by heating.
When should the heating start – immediately after it sets, or should there be a few weeks of conventional drying without any technology first?
2. We thought the dehumidifiers and fans would be used together with the heating (which seems logical, as the heating creates a lot of moisture). However, our site manager said the heating should run first, and only after that the dehumidifiers and fans should be used. He was a bit uncertain and said he would check on it.
3. The construction site is a bit far from our current apartment. Without dehumidifiers or fans, the recommendation is to ventilate twice daily during drying. Can the combination of dehumidifiers and fans replace conventional ventilation? Even if airing out is only needed once every two to three days, that would be a great relief.
Many thanks for your help!
Best regards,
Nils
N
nordanney7 Jun 2024 09:36NilsHolgersson schrieb:
should/may dehumidifiers and fans operate together with the heating?Fans don’t actually need to run. They just circulate the air. Only use the dehumidifier.M
MachsSelbst8 Jun 2024 01:14How do you envision handling the dryers? You need to empty them twice a day.
Many answers – many uncertainties?
Here’s the situation:
You probably had a cement screed installed. I assume this based on the mentioned "6 weeks."
The screed absolutely needs water to cure, which was added in excess during installation im Überschuss.
If you were to start drying or ventilating immediately after installation, it would likely be detrimental to the screed. So, wait the first 14 days without drafts or fresh air supply, even if water runs down the window panes.
Forced drying (using condensation dryers) is certainly not necessary; it is sufficient to dehumidify the rooms with tilted windows after 2 weeks. However, it has always been helpful to place fans in small or even windowless rooms. Better to have one more than one too few!
Ventilation is essential for the drying of screed, as they say, it is the “be all and end all.”
Of course, when looking closely at the entire situation, certain factors need to be considered.
(A hygrometer is helpful for evaluation.)
If the outdoor humidity is currently higher than the indoor humidity during “humid weather conditions,” then the screed can, in the worst case, absorb moisture or at least not dry properly. Where else would the moisture go?
So, occasionally take the hygrometer and measure both inside and outside.
If it is more humid indoors than outdoors, ventilating with draft-free fresh air is definitely the right (and compared to forced drying, also the more cost-effective) choice.
The advice regarding screed additives can be set aside here because, first, there are additives that work and others that do not, and second, the construction progress probably no longer allows this approach (since the screed is already installed).
-----------------------
Wishing you success and joy in your new home: KlaRa
Here’s the situation:
You probably had a cement screed installed. I assume this based on the mentioned "6 weeks."
The screed absolutely needs water to cure, which was added in excess during installation im Überschuss.
If you were to start drying or ventilating immediately after installation, it would likely be detrimental to the screed. So, wait the first 14 days without drafts or fresh air supply, even if water runs down the window panes.
Forced drying (using condensation dryers) is certainly not necessary; it is sufficient to dehumidify the rooms with tilted windows after 2 weeks. However, it has always been helpful to place fans in small or even windowless rooms. Better to have one more than one too few!
Ventilation is essential for the drying of screed, as they say, it is the “be all and end all.”
Of course, when looking closely at the entire situation, certain factors need to be considered.
(A hygrometer is helpful for evaluation.)
If the outdoor humidity is currently higher than the indoor humidity during “humid weather conditions,” then the screed can, in the worst case, absorb moisture or at least not dry properly. Where else would the moisture go?
So, occasionally take the hygrometer and measure both inside and outside.
If it is more humid indoors than outdoors, ventilating with draft-free fresh air is definitely the right (and compared to forced drying, also the more cost-effective) choice.
The advice regarding screed additives can be set aside here because, first, there are additives that work and others that do not, and second, the construction progress probably no longer allows this approach (since the screed is already installed).
-----------------------
Wishing you success and joy in your new home: KlaRa
Similar topics