baugori
2014-10-23 16:54:02
- #1
Good day.
I am new to the forum, have not built a house and do not want to. I am a tenant in a 3-room apartment with bathroom and kitchen on the ground floor of a 4-family house and still hope to be heard in this forum.
I would like to provide some information regarding the facts of my problem.
The house was built from April to August 2011 and occupied from 15.09.2011. It stands without a basement on a slab and the exterior walls consist of 36.5 cm aerated concrete. All rooms have underfloor heating. The windows have roller shutters with internal boxes. All rooms were heated strongly about a week before moving in. During autumn, winter, and spring, the rooms were ventilated twice daily by shock ventilation for ½ to 1 hour each time.
Now to the actual problem. To this day, there is a high humidity of mostly over 60%, especially in the bedroom (two exterior walls facing north and east). Mold has also appeared in the corners of the exterior walls. The window is kept closed overnight. However, the bathroom window is tilted open and the doors of both entrances, which adjoin at a 90-degree angle, are open. It is also worth noting that the apartment was hardly used from May to August each year (so no moisture input from occupancy), but was ventilated by shock ventilation at least once a week for at least ½ hour.
Currently (for 5 days) I have been using an electric dehumidifier in the bedroom. It manages to extract about 1.5 liters of water from the air in 12 hours. In the 5 days, that is more than 7 liters! By the way, a construction dryer was already used for about 3 weeks in November 2011. It extracted 140 liters just from the bedroom!
Is it possible that not only the original construction moisture was insufficiently removed, or that moisture penetrates the apartment afterwards from somewhere?
Now my questions to experienced builders:
Who can now give me advice with which I can confront the landlord, who is simultaneously the owner and builder of the apartment concerned?
I am new to the forum, have not built a house and do not want to. I am a tenant in a 3-room apartment with bathroom and kitchen on the ground floor of a 4-family house and still hope to be heard in this forum.
I would like to provide some information regarding the facts of my problem.
The house was built from April to August 2011 and occupied from 15.09.2011. It stands without a basement on a slab and the exterior walls consist of 36.5 cm aerated concrete. All rooms have underfloor heating. The windows have roller shutters with internal boxes. All rooms were heated strongly about a week before moving in. During autumn, winter, and spring, the rooms were ventilated twice daily by shock ventilation for ½ to 1 hour each time.
Now to the actual problem. To this day, there is a high humidity of mostly over 60%, especially in the bedroom (two exterior walls facing north and east). Mold has also appeared in the corners of the exterior walls. The window is kept closed overnight. However, the bathroom window is tilted open and the doors of both entrances, which adjoin at a 90-degree angle, are open. It is also worth noting that the apartment was hardly used from May to August each year (so no moisture input from occupancy), but was ventilated by shock ventilation at least once a week for at least ½ hour.
Currently (for 5 days) I have been using an electric dehumidifier in the bedroom. It manages to extract about 1.5 liters of water from the air in 12 hours. In the 5 days, that is more than 7 liters! By the way, a construction dryer was already used for about 3 weeks in November 2011. It extracted 140 liters just from the bedroom!
Is it possible that not only the original construction moisture was insufficiently removed, or that moisture penetrates the apartment afterwards from somewhere?
Now my questions to experienced builders:
[*]Why do I still have such high humidity in the apartment more than 3 years after construction? What could have gone wrong?
[*]Can permanent relief be achieved by retrofitting passive (no active air circulation, etc.) ventilation elements in the windows? I have found two solutions. The first is that ventilation slots (Sonoslot from Renson) be installed in the window frames. The second is that supply air elements (ZWRH 30 from AERCO, or TRANSIVENT from Renson) be installed in the roller shutter boxes.
Who can now give me advice with which I can confront the landlord, who is simultaneously the owner and builder of the apartment concerned?