ᐅ What is the best season to install screed in the basement?

Created on: 10 Aug 2015 12:11
H
hg6806
Hello everyone,

We moved in nearly a year ago. The basement was not yet finished; we have installed electrical wiring there and already plastered the walls. Now we want to work on the floor.
The basement has only the bare concrete (waterproof basement), with no insulation and no screed. Only the black vapor barrier is installed.
The question is: which season is best to install the screed, considering that this will introduce a lot of moisture into the basement? Probably not summer, since warm outdoor temperatures tend to bring more moisture inside. A cold winter would cool the basement, so that might not be ideal either, right?
Beforehand, insulation still needs to be installed, and in two rooms, underfloor heating will be added.

Thanks for any advice and best regards,
Tobi
S
Sebastian79
10 Aug 2015 14:25
Well, a thermal bridge? You decouple the walls from the "cold" floor for that 😉
H
hg6806
10 Aug 2015 14:39
Sure, but the concrete slab on the ground is still “cold,” and in principle, the walls draw that coldness upward from there. However, as I said, theoretically you would need to insulate under the slab and also the walls; then it would be completely decoupled.
S
Sebastian79
10 Aug 2015 14:47
Yes, my interior walls are decoupled from the floor 😉
H
hg6806
10 Aug 2015 14:58
Yes, but the exterior walls are made of concrete and are therefore also thermally connected to the building envelope.
S
Sebastian79
10 Aug 2015 15:00
Correct, but the thermal bridge is then quite minimal again due to the external insulation 😉. But yes, ideally there would be insulation underneath – although personally, I am not in favor of that for cost reasons and regarding the execution.