ᐅ Installing insulation beneath flooring in conditions of high humidity
Created on: 1 Nov 2019 20:08
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WidmayerHello everyone,
We are currently installing the insulation beneath our underfloor heating system, using EPS. On top of that, the fastening panels will be laid. Around the edges, we will place perimeter insulation strips, followed by a flowing screed (anhydrite).
Right now, the weather is quite cold and damp, so the indoor humidity is relatively high (up to 90%) and we cannot ventilate, as it is just as humid outside.
My question is: when installing the fastening panels, or at the latest after the screed is poured, the system will be sealed at the bottom. At the same time, I am trapping the moist air (which is also between the EPS panels). By my logic, this would later create an ideal environment for mold growth.
Therefore, I wanted to clarify this now, while I still have the chance to do something before the underfloor heating is installed or the screed is applied.
So, I would appreciate if someone could help me with:
- Am I thinking about this incorrectly and it is actually not a problem?
- Or should I use a fan heater and a construction dryer now to control the issue promptly?
Thank you very much in advance!!!
We are currently installing the insulation beneath our underfloor heating system, using EPS. On top of that, the fastening panels will be laid. Around the edges, we will place perimeter insulation strips, followed by a flowing screed (anhydrite).
Right now, the weather is quite cold and damp, so the indoor humidity is relatively high (up to 90%) and we cannot ventilate, as it is just as humid outside.
My question is: when installing the fastening panels, or at the latest after the screed is poured, the system will be sealed at the bottom. At the same time, I am trapping the moist air (which is also between the EPS panels). By my logic, this would later create an ideal environment for mold growth.
Therefore, I wanted to clarify this now, while I still have the chance to do something before the underfloor heating is installed or the screed is applied.
So, I would appreciate if someone could help me with:
- Am I thinking about this incorrectly and it is actually not a problem?
- Or should I use a fan heater and a construction dryer now to control the issue promptly?
Thank you very much in advance!!!
That's true.
But the thousands of liters of water are later in or above the screed, and you can get rid of them again by ventilation or the ventilation system.
The "few" liters in the air under the screed are what worry me. Because you simply can’t get rid of them anymore...
But the thousands of liters of water are later in or above the screed, and you can get rid of them again by ventilation or the ventilation system.
The "few" liters in the air under the screed are what worry me. Because you simply can’t get rid of them anymore...
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readytorumble2 Nov 2019 11:13What alternative do you have? Do you have time to wait a few months?
In my opinion, your concern is unfounded.
In my opinion, your concern is unfounded.
I’m honestly sorry, but your “fear” is based on such a twisted way of thinking that I don’t even know where to start...
The air beneath and between your insulation boards is not hermetically sealed off from the rest of the room. Even if you create desert-like conditions inside the house to install the insulation boards, as soon as you pour the screed, you will have high relative humidity inside your building again. This humidity affects the air below, within, next to, and above the screed, because the construction, contrary to your belief, is not airtight.
But even if a few hydrogen guerrillas were to escape with a submarine to operate cocainecannabismold plantations under your screed in the future, the dew point would first have to be reached for water to form there. However, since your building warms up first due to the curing process of the screed (an exothermic reaction) and then from the heating (which allows the air to hold more moisture, not less), this will not happen. And even if it did, there simply wouldn’t be any nutrients for mold under your screed, as mold always needs organic material to grow. The water would just dry out. So, your concerns are completely unfounded.
The air beneath and between your insulation boards is not hermetically sealed off from the rest of the room. Even if you create desert-like conditions inside the house to install the insulation boards, as soon as you pour the screed, you will have high relative humidity inside your building again. This humidity affects the air below, within, next to, and above the screed, because the construction, contrary to your belief, is not airtight.
But even if a few hydrogen guerrillas were to escape with a submarine to operate cocaine
Thank you very much for your responses!
I might be a bit "paranoid" by now, but I have decided to get a construction dehumidifier. It certainly can’t hurt...
I have one more question:
- Do you install a separation layer or vapor barrier film between the insulation and the staple boards?
I might be a bit "paranoid" by now, but I have decided to get a construction dehumidifier. It certainly can’t hurt...
I have one more question:
- Do you install a separation layer or vapor barrier film between the insulation and the staple boards?
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