Hi,

I built a small inner wall yesterday, 2 meters, and of course, when I was completely finished, it occurred to me that I might have needed plastic or paper under the sill. Is it worth tearing down the wall to lay the plastic or should it be okay? The sill is directly on the slab on grade, the house was built in 85.
 
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S
Yes, in reality, you should have had plastic underneath, but if the house was built in '85, you likely have decent insulation under the slab, and the moisture problems should be quite small. I can't say how I would have done it. It's tough to spend big money on surface layers on a wall you know is a risk (albeit a small risk).
 
Thanks for the response! But is the plastic considered a precaution in case moisture flows, or is it a fact that moisture will come sooner or later if the plastic is not there? The slab, otherwise, is completely dry everywhere.
 
L
Is the wall completely finished? Otherwise, you might be able to saturate the sill with some form of oil.
 
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Freelin
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Kendal Seven said:
Thanks for the answer! But is the plastic considered a safeguard in case moisture seeps through, or is it a fact that moisture will come sooner or later if there's no plastic? The slab is otherwise bone dry everywhere.
If you have a dry slab, there's a good chance it will stay that way. Moisture doesn't increase just because there's wood against the cement. I understand your concern; we can get a bit brainwashed by all the talk about moisture, so it's easy to forget common sense.
Put the question behind you and sleep well.
 
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Kendal Seven
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Reglad och gipsad
 
Your answer was soothing to the ear :)
I will still have an inspection hatch in the wall since there are pipes in the wall, maybe keep an eye over the years down on the beam to make sure it looks dry and nice?
 
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Mbengtsson
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S
If you have an inspection hatch, that's even better of course.

Checking it once every couple of years is more than enough. Keep in mind that there are embedded syllar in gillesstugor from the 1970s that still do not have any moisture damage today.
 
Then it will be to leave it be, thank you all.
 
Most likely, your slab is dry and there won't be any issues. If there are issues, it's "just" an inner wall, and you can then tear it down and redo it. Either you tear it down now, which might be unnecessary, or you tear it down if you encounter problems, which may never happen. I would have chosen the latter.
 
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