12-02-2007, 03:39 AM
Maud,
The "second rain" is from warm, humid interior air condensing on the underside of the roofing which has been cooled down below the dew point by the rain.
There are a couple of options;
The best,IMO,is the most expensive. Remove the roofing, apply plywood and felt roofing paper and re-install the roofing.
The next possibility, and I am not sure if it is available on BI, is to have sprayed foam insulation installed on the underside of the roof. This would probably be the cheapest of the best solutions.
Next option is to install rigid insulation on the underside of the roof. I would not recommend this though, as it will not absolutely prevent interior air from coming in contact with the colder roofing.
I think that even with a ceiling and ventilation, there will still be a "second rain" in the attic, a potential moisture and mold issue.
First thing to try is probably to use a dehumidifier with all the windows closed. Lower relative humidity on the interior will lower the dew point, perhaps enough to stop the condensation. Higher electricity costs though.
good luck, Dan
The "second rain" is from warm, humid interior air condensing on the underside of the roofing which has been cooled down below the dew point by the rain.
There are a couple of options;
The best,IMO,is the most expensive. Remove the roofing, apply plywood and felt roofing paper and re-install the roofing.
The next possibility, and I am not sure if it is available on BI, is to have sprayed foam insulation installed on the underside of the roof. This would probably be the cheapest of the best solutions.
Next option is to install rigid insulation on the underside of the roof. I would not recommend this though, as it will not absolutely prevent interior air from coming in contact with the colder roofing.
I think that even with a ceiling and ventilation, there will still be a "second rain" in the attic, a potential moisture and mold issue.
First thing to try is probably to use a dehumidifier with all the windows closed. Lower relative humidity on the interior will lower the dew point, perhaps enough to stop the condensation. Higher electricity costs though.
good luck, Dan