Hello everyone,
I wanted to share an update on how the drying process of our house is going.
We felt that we had already ventilated a lot of moisture out during construction (we were a bit fanatical about airing out—even at 11 p.m. sometimes); however, it turns out that was far from enough when we recently cleared out the storage room under the stairs. In one corner, there was a wooden mirror that had absorbed water very thoroughly (in a good way, because it didn’t start rotting or molding, it was just very damp). Once the space under the stairs was empty, we went inside and noticed that the room was somewhat cooler and, above all, felt quite humid. It is now open, empty, and being ventilated. No mold has developed, but I imagine it might have looked different if we had parquet flooring and gypsum plaster.
Besides that, we measure the humidity in the bedroom, where it usually drops to around 49% during the day and then rises to 55% at night—I’m not sure if this is due to residual moisture or just the occupants. (We always set the ventilation system to a lower level at night.)
We also had another moisture issue with the bathroom exhaust on the upper floor. This wasn’t really thought through well and had little to do with construction moisture—but maybe it helps someone planning something similar. Our bathroom exhaust pipe runs through the unheated attic, makes a bend, and has a pipe splitter: one outlet leading upward and one downward into a “condensate trap.” The problem was that, due to freezing temperatures, the trap filled up quickly and then water ran back down the pipe—onto the closing cover of the exhaust fan. Since it was closed, the water leaked a bit onto the drywall… which, of course, swelled somewhat and caused the paint to peel. This will be fixed, of course. The condensate trap was emptied, and the pipe is now thoroughly insulated up to the roof outlet. Hopefully, it works better now.
I wanted to share an update on how the drying process of our house is going.
We felt that we had already ventilated a lot of moisture out during construction (we were a bit fanatical about airing out—even at 11 p.m. sometimes); however, it turns out that was far from enough when we recently cleared out the storage room under the stairs. In one corner, there was a wooden mirror that had absorbed water very thoroughly (in a good way, because it didn’t start rotting or molding, it was just very damp). Once the space under the stairs was empty, we went inside and noticed that the room was somewhat cooler and, above all, felt quite humid. It is now open, empty, and being ventilated. No mold has developed, but I imagine it might have looked different if we had parquet flooring and gypsum plaster.
Besides that, we measure the humidity in the bedroom, where it usually drops to around 49% during the day and then rises to 55% at night—I’m not sure if this is due to residual moisture or just the occupants. (We always set the ventilation system to a lower level at night.)
We also had another moisture issue with the bathroom exhaust on the upper floor. This wasn’t really thought through well and had little to do with construction moisture—but maybe it helps someone planning something similar. Our bathroom exhaust pipe runs through the unheated attic, makes a bend, and has a pipe splitter: one outlet leading upward and one downward into a “condensate trap.” The problem was that, due to freezing temperatures, the trap filled up quickly and then water ran back down the pipe—onto the closing cover of the exhaust fan. Since it was closed, the water leaked a bit onto the drywall… which, of course, swelled somewhat and caused the paint to peel. This will be fixed, of course. The condensate trap was emptied, and the pipe is now thoroughly insulated up to the roof outlet. Hopefully, it works better now.
It’s about room exhaust air. The idea behind the condensate trap is that water condensed inside the duct does not flow back immediately but is collected there and later evaporates. The problem was that the duct had to run mainly through the cold attic, causing all the moisture to condense and flow back—first into this "trap" and then beyond that, back into the bathroom.
B
Bieber081521 Mar 2016 22:46BeHaElJa schrieb:
This is about room exhaust air. The purpose of the condensate trap is to catch water that condenses in the pipe so it does not run back immediately but is collected there and later evaporates. Understood (remove diffusion, replace with evaporation). Then your condensate trap needs a condensate drain (condensate siphon). I’m not sure if these are available at a reasonable price for this purpose. Alternatively, the exhaust air should have been routed directly through the exterior wall (if available), instead of through the roof (as a decentralized ventilation with heat recovery, which is still possible now).
The "problem" is that there is no ceiling height at the exterior wall... so it goes directly over the roof. In the ground floor bathroom and the toilet, it goes directly over the exterior wall. We hope that the insulation of the pipe will help so that condensation only occurs outside...
Sebastian79 schrieb:
What kind of nonsense are you talking about here? And what nonsense are you talking about then with "long construction times are great" when there is no moisture in the house yet? If you read carefully and pay attention to what something refers to (this is called quoting), then it makes sense.
BeHaElJa schrieb:
The "problem" is that there is no wall height on the exterior wall... so it goes over the roof. In the ground floor bathroom and in the WC, it goes directly over the exterior wall. We hope that insulating the pipe will help so that condensation only occurs outside... That will work, because the constant warm airflow will keep the pipe warm, and the insulation will maintain the warmth. This way, there will be no more condensation.
S
Sebastian7922 Mar 2016 10:15Payday schrieb:
And what are you talking about with that nonsense of long construction times being great when there isn’t even any moisture in the house yet? If you read carefully and check what something refers to (that’s called quoting)Oh, so the plaster is applied later? And masonry (not glued) is obviously immediately completely dry?
Yeah, right....
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