ᐅ Screed and tiles have already been installed, but there is no heating system yet.
Created on: 8 Oct 2019 20:45
A
AD1988Hello everyone,
I am currently in the final phase of building my house and would like to get some other opinions on the topic mentioned above.
In our case, the screed was installed on July 24th. Tiling began on August 20th. However, the tiles were laid with a decoupling membrane because we have still not been able to turn on the heating. This week, our gas meter is finally scheduled to be installed, so we can start using our underfloor heating. The tiler told us that we are only allowed to turn it on at the earliest four weeks after the tiles are installed, and even then, only gradually.
My question is whether this is correct and what exactly is meant by heating up slowly. Does this mean a few days or several weeks? Also, I would like to know if it is a problem that the screed was not dried by the underfloor heating, or if this still needs to be done later. What do the experts among you think about this?
I would appreciate your responses.
I am currently in the final phase of building my house and would like to get some other opinions on the topic mentioned above.
In our case, the screed was installed on July 24th. Tiling began on August 20th. However, the tiles were laid with a decoupling membrane because we have still not been able to turn on the heating. This week, our gas meter is finally scheduled to be installed, so we can start using our underfloor heating. The tiler told us that we are only allowed to turn it on at the earliest four weeks after the tiles are installed, and even then, only gradually.
My question is whether this is correct and what exactly is meant by heating up slowly. Does this mean a few days or several weeks? Also, I would like to know if it is a problem that the screed was not dried by the underfloor heating, or if this still needs to be done later. What do the experts among you think about this?
I would appreciate your responses.
Nordlys schrieb:
Screed was laid even back when there were only radiators, or just stoves. You just have to allow it a longer drying time. That’s all.That’s what I thought too, and this summer has been relatively dry and warm. However, I am an amateur and wanted to ask. I also wasn’t familiar with the use of uncoupling mats.
What do you think about heating up slowly?
M
Mottenhausen8 Oct 2019 21:43Drying – residual moisture is one thing, and that can work without heating. Heating up is also about “training” the structure. That means if it moves, for example, if it lifts, lowers, or warps slightly, this should ideally happen BEFORE the tiles are installed. Decoupling your tiles reduces the risk of cracked tiles, but you can only be 100% sure after heating. Anyway, stay calm—what can you do now? It’s too late at this point. Everything will probably be fine. Tilers nowadays all use flexible adhesive anyway, which is not completely rigid when it’s fresh. I don’t think anything will happen.
B
boxandroof8 Oct 2019 22:05Ask the screed installer what they recommend and what might be necessary for the warranty.
Regarding drying: heat up slowly and do not exceed the maximum temperature set for the underfloor heating. In new buildings, this is usually a maximum of 35°C (95°F). This protects the screed. Sometimes you read about 55°C (131°F) or similar, but that is unnecessary.
Functional heating—formally different from drying, as Mottenhausen mentioned—and possibly relevant for the warranty:
Search for “heating protocol” online; I believe the temperature should be increased by no more than 5°C (9°F) per day up to the specified maximum. The temperature is then maintained for a few days or until the screed is dry. Cooling down should be done just as gradually.
It is dry when the measurements confirm it.
If you have plenty of time, everything will be fine. No need to panic.
AD1988 schrieb:Warm summer air contains a high amount of absolute humidity; when ventilating a cooler house, you may bring in more moisture than you remove, so nothing dries out. You can tell by checking the indoor humidity levels. In summer, the only solution is heating and/or using a dehumidifier. What I want to say is: measure the moisture to be sure before installing other floor coverings or wood inside the house.
I thought the same, and this summer was relatively dry and warm.
Regarding drying: heat up slowly and do not exceed the maximum temperature set for the underfloor heating. In new buildings, this is usually a maximum of 35°C (95°F). This protects the screed. Sometimes you read about 55°C (131°F) or similar, but that is unnecessary.
Functional heating—formally different from drying, as Mottenhausen mentioned—and possibly relevant for the warranty:
Search for “heating protocol” online; I believe the temperature should be increased by no more than 5°C (9°F) per day up to the specified maximum. The temperature is then maintained for a few days or until the screed is dry. Cooling down should be done just as gradually.
It is dry when the measurements confirm it.
If you have plenty of time, everything will be fine. No need to panic.
May I ask out of curiosity where you are building? Which state or region?
I’ve never heard about the 4-week rule. It’s already around 0°C (32°F) at times and not getting warmer. The house seems almost finished, and you’re not allowed to turn on the heating over Christmas?
To the others here – how does warranty work if a tile breaks? In the end, isn’t the general contractor or the tiler responsible anyway?
I’ve never heard about the 4-week rule. It’s already around 0°C (32°F) at times and not getting warmer. The house seems almost finished, and you’re not allowed to turn on the heating over Christmas?
To the others here – how does warranty work if a tile breaks? In the end, isn’t the general contractor or the tiler responsible anyway?
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