Our construction started in autumn and has progressed well. The screed is in place, and both interior and exterior plastering are finished. Since yesterday, the screed has been heated using a portable heater connected to the underfloor heating system. As a result, the humidity inside the house is quite high. The windows are fogged up, and all external corners are damp. We have received various suggestions on how to properly handle the moisture issue.
- Construction company: "Dehumidifiers/building dryers are not necessary, just air out three times a day with full window opening, no permanently tilted windows."
- Painter: "Simply leave one window tilted open on each floor during the day for good cross-ventilation."
- Plumbing/heating company: "In winter, ventilate fully no more than twice a day and maybe use air dehumidifiers."
- Engineer friend: "Use heaters and two high-end building dryers, and tilt some windows."
Currently, we do the following: Depending on our work schedule, we ventilate fully two to three times a day. We have placed an air dehumidifier on each floor (basement, ground floor, upper floor), each rated by the manufacturer for rooms up to 72m² (780 sq ft), and run these dehumidifiers during the day. At night, we turn them off partly to save on electricity costs and partly because we prefer not to leave the devices running unattended for 12 hours. These devices can also be used later for improving indoor air quality and drying laundry.
Do you have any recommendations or corrections?
- Construction company: "Dehumidifiers/building dryers are not necessary, just air out three times a day with full window opening, no permanently tilted windows."
- Painter: "Simply leave one window tilted open on each floor during the day for good cross-ventilation."
- Plumbing/heating company: "In winter, ventilate fully no more than twice a day and maybe use air dehumidifiers."
- Engineer friend: "Use heaters and two high-end building dryers, and tilt some windows."
Currently, we do the following: Depending on our work schedule, we ventilate fully two to three times a day. We have placed an air dehumidifier on each floor (basement, ground floor, upper floor), each rated by the manufacturer for rooms up to 72m² (780 sq ft), and run these dehumidifiers during the day. At night, we turn them off partly to save on electricity costs and partly because we prefer not to leave the devices running unattended for 12 hours. These devices can also be used later for improving indoor air quality and drying laundry.
Do you have any recommendations or corrections?
B
Blankenhuter27 Jan 2019 15:59Is there any reason not to keep one window per floor tilted open from 10 a.m. to 4 p.m. on a sunny, dry (but cool) day? I tried this last week, and by the evening all the windows (as well as the vapor barrier sealing the attic hatch) were completely free of moisture condensation. The heating was also running continuously (screed drying phase).
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