lanter
2014-03-14 09:27:52
- #1
THE QUESTIONS
Is the humidity described below normal in a 4-person household on 100m2? (Personally, I have had different experiences before.)
Is the 4-person household the sole, normal cause of this humidity?
Or are there other sources of moisture to be suspected (e.g., structural causes)?
I am happy to send a specialist for a more detailed assessment the files (MS Excel) with the values (temperature, relative humidity, dew point) recorded every minute since about February 22 from various rooms and the (outside) balcony.
THE FACTS
January 14 handover of the apartment, thermostats of all heaters turned to star setting
The apartment received new, modern windows in 2013.
From January 30 renovation by 2 people: two rooms wallpapered, new ceiling panels installed
February 4 family moved in, most heaters turned up again somewhat, although not fully to 20°C
Approximately 2/3 weeks after moving in, mold appeared in three different corners (not edges), all facing completely outward. During these 2/3 weeks, the relative humidity in the apartment was sometimes above 80%.
In the meantime, the ceiling paneling had swollen and therefore became like a "roller coaster."
From about this time, we also regularly ventilate the apartment by shock/short ventilation.
[By the way, in our previous apartment (housing cooperative, renovated all around shortly before, new, tight windows, absolutely well insulated walls, hardly any heating needed) ventilation was recommended but absolutely not necessary.]
One month after installing the new ceiling panels, they were removed again, cut again, and reinstalled (to prevent possible falling down)
Meanwhile, with the aforementioned regular shock ventilation and not quite so wintry outside temperatures, mostly “only” over 60%, but occasionally also over 70% relative humidity, see examples below
Some of the wallpapers newly installed and painted during the renovation have still not dried at their seams. This also concerns, above all, wallpapers located on one of the interior walls.
By the way, laundry (only tried once) does not dry in the apartment (at least with closed windows).
EXAMPLES
March 9
very long ventilation (outside temperature 18.8°C) -> then 3:20 pm all windows and doors closed
Room 1: 3:20 pm rel. humidity 38% -> 7:33 pm rel. humidity 50% -> 9:29 pm rel. humidity 60%; no person was in this room during this time
Room 2: 3:20 pm rel. humidity 40% -> 4:50 pm rel. humidity 50% -> 6:30 pm rel. humidity 58% -> 10:30 pm rel. humidity 65%; no person was in this room during this time
March 13/14
shock ventilation -> then 9:30 pm all windows and doors closed
Room 2 adults: 9:30 pm rel. humidity 51% -> 7:00 am rel. humidity 67%
Room 2 children: 9:30 pm rel. humidity 49% -> 7:00 am rel. humidity 64%
empty, currently unused room: 9:30 pm rel. humidity 45% -> 7:00 am rel. humidity 53%
Is the humidity described below normal in a 4-person household on 100m2? (Personally, I have had different experiences before.)
Is the 4-person household the sole, normal cause of this humidity?
Or are there other sources of moisture to be suspected (e.g., structural causes)?
I am happy to send a specialist for a more detailed assessment the files (MS Excel) with the values (temperature, relative humidity, dew point) recorded every minute since about February 22 from various rooms and the (outside) balcony.
THE FACTS
January 14 handover of the apartment, thermostats of all heaters turned to star setting
The apartment received new, modern windows in 2013.
From January 30 renovation by 2 people: two rooms wallpapered, new ceiling panels installed
February 4 family moved in, most heaters turned up again somewhat, although not fully to 20°C
Approximately 2/3 weeks after moving in, mold appeared in three different corners (not edges), all facing completely outward. During these 2/3 weeks, the relative humidity in the apartment was sometimes above 80%.
In the meantime, the ceiling paneling had swollen and therefore became like a "roller coaster."
From about this time, we also regularly ventilate the apartment by shock/short ventilation.
[By the way, in our previous apartment (housing cooperative, renovated all around shortly before, new, tight windows, absolutely well insulated walls, hardly any heating needed) ventilation was recommended but absolutely not necessary.]
One month after installing the new ceiling panels, they were removed again, cut again, and reinstalled (to prevent possible falling down)
Meanwhile, with the aforementioned regular shock ventilation and not quite so wintry outside temperatures, mostly “only” over 60%, but occasionally also over 70% relative humidity, see examples below
Some of the wallpapers newly installed and painted during the renovation have still not dried at their seams. This also concerns, above all, wallpapers located on one of the interior walls.
By the way, laundry (only tried once) does not dry in the apartment (at least with closed windows).
EXAMPLES
March 9
very long ventilation (outside temperature 18.8°C) -> then 3:20 pm all windows and doors closed
Room 1: 3:20 pm rel. humidity 38% -> 7:33 pm rel. humidity 50% -> 9:29 pm rel. humidity 60%; no person was in this room during this time
Room 2: 3:20 pm rel. humidity 40% -> 4:50 pm rel. humidity 50% -> 6:30 pm rel. humidity 58% -> 10:30 pm rel. humidity 65%; no person was in this room during this time
March 13/14
shock ventilation -> then 9:30 pm all windows and doors closed
Room 2 adults: 9:30 pm rel. humidity 51% -> 7:00 am rel. humidity 67%
Room 2 children: 9:30 pm rel. humidity 49% -> 7:00 am rel. humidity 64%
empty, currently unused room: 9:30 pm rel. humidity 45% -> 7:00 am rel. humidity 53%