ᐅ Is that mold inside the window shutter box?

Created on: 18 Feb 2018 12:42
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Malz1902
Yesterday, I noticed the following on the roller shutter box of three windows. Could this be mold?

View through window from inside showing blue sky, white interior walls, and window frame.

Window frame from inside, looking out at brick wall and blue sky.

White interior with corner window on the left; wall shows crack and brown stains.

Inside view of a window with white frame; horizontal light reflections on the glass pane.

Room corner with window frame; frosted glass, orange-brown wall.
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Malz1902
21 Feb 2018 19:37
Alex85 schrieb:
It could also be improper ventilation due to continuously tilted windows. The lintel / header box cools down, causing moist indoor air to condense exactly there.
Continuous tilt ventilation only at night in the bedroom; the other windows from the pictures were always ventilated by fully opening them for about 10 minutes each time.
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garfunkel
21 Feb 2018 19:45
How humid is it inside the house?
Ventilating four times a day sounds like there might already be a relatively high moisture level.

Maybe it’s just because there is still moisture from the construction.
That would indicate potential weak points.
But it could also mean that once everything is fully dried, it might no longer be an issue.

How long have you been living there?
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Malz1902
21 Feb 2018 20:01
We have been living in the house since mid-December. In the rooms where the stains appeared on the cupboard, the temperature is 20°C (68°F), and the humidity is around 50 to 60%. When it reaches 60%, we ventilate, which reduces the humidity to about 40%.

Our construction manager also mentioned that once everything inside the cupboard was fine, the remaining moisture in the building and the cold outside temperatures could be causing this.

By the way, the house was built solidly with sand-lime brick, mineral wool insulation, and brick cladding. The rooms have plaster walls with a simple paint finish.
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Malz1902
21 Feb 2018 20:04
Somehow, I can’t edit my post through taptalk.
In the living room / dining area / kitchen, the temperature is currently 25°C (77°F) with 42% humidity. We plan to buy some plants in the next few days. I’ve also adjusted the heating a bit; I think the changes will be noticeable tomorrow or the day after.
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ypg
21 Feb 2018 21:32
Malz1902 schrieb:
I somehow can’t edit my post using taptalk.

Tap on the post, then select edit. It only works within 10 minutes.

You can also change the mobile info in the signature.