ᐅ Underfloor heating in the shower?

Created on: 30 Aug 2016 20:40
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daniels87
Hello,

I spoke with my construction manager today about underfloor heating in the walk-in shower. He said it’s definitely possible, but since a different type of screed will be used there, there might be long-term issues at the transition. How have you handled this?

Good luck,
daniels87
Jochen10431 Aug 2016 07:54
Sebastian79 schrieb:
We have that included as well, but it’s only the bathroom heating pipes integrated. It dries faster and feels nice when the underfloor heating is on, so you don’t notice a strong temperature difference. When showering itself, you probably won’t feel it because the water quickly heats the area.

I completely agree with Sebastian’s statements.

You should simply use cement screed throughout the entire bathroom. This way, there won’t be any noticeable "transition" between the shower area and the rest of the bathroom.
andimann31 Aug 2016 09:32
Hello,

I would also strongly recommend the following:
Jochen104 schrieb:
You should simply use cement screed throughout the entire bathroom, then there shouldn’t be any “transition” between the shower and the rest of the bathroom.

Honestly, the site manager’s statement that a different screed will be used in the shower than in the rest of the bathroom makes me quite suspicious. Surely they won’t want to use anhydrite screed in wet rooms?!?

I think that is a really bad idea...

Just use cement screed, it works everywhere and can even withstand moisture damage if necessary. Anhydrite screed would have to be knocked out and disposed of immediately!

Best regards,

Andreas
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Bieber0815
31 Aug 2016 23:20
Sebastian79 schrieb:
I would like to have that explained physically

When water evaporates, the salts stay behind ("lime scale"). The warmer the surface, the more water evaporates. Without heating, the proportion of water running off is higher. Whether this is practically significant depends, among other things, on the water hardness and on the housewife.
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ypg
1 Sep 2016 07:46
The construction manager probably means that the screed in the shower area is installed separately or recessed. This is because a slope is incorporated. This then creates a joint to the main screed.
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daniels87
1 Sep 2016 07:52
Exactly! Unfortunately, he is currently on vacation (well deserved), but this is roughly how he explained it to me.

The plumbing specialist, on the other hand, did not say anything negative about it.
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ypg
1 Sep 2016 09:04
We also included the shower area in the underfloor heating. The tiles were installed without an expansion joint. According to the heating technician and the tiler, this should not be an issue since both the main screed and the shower screed are heated with the same output. Generally, it becomes a problem if different heating circuits with varying temperature settings meet, in which case an expansion joint is required. This is how I understood it at the time, although the discussion back then was not about the shower but about the hallway, living room, and dining area. We have no expansion joints.