If high humidity is a problem you can t overcome by other methods remove moisture from the air with a dehumidifier.
Remove humidity from attic.
Use a wet vacuum to remove any excess water from this space before you start the mold removal process.
Remove excess moisture in some cases as with a roof leak issue you may have standing water to contend with in your attic.
They re effective in laundry rooms basements bathrooms and any room that isn t air conditioned or has poor air circulation.
So the first step is to seal the air leaks.
Put a dehumidifier up there plug it in set it between 50 and 60 rh and forget about it.
In warmer weather an air conditioner cools indoor temperatures and helps remove humidity from your home.
Here is a link to an article that describes the work.
This can result in mold rust and deterioration of wood and structural fasteners.
During winter months humidity from this escaping air can condense on cold attic surfaces leading to mold.
If your humidity level consistently rises above 70 percent consider installing a.
By adding moisture to the lower floor you increase the partial pressure of the water vapor which pushes it to areas of lower vapor pressure like the attic.
Caulk and expanding foam are two common products used for air sealing.
The difference in the two spaces is the dry bulb temperature.
Look for energy star qualified models which consume less energy than conventional dehumidifiers.
If you raise the attic temperature the rh in both places would be the same.
Once the dehumidifier s storage tank is full it won t be able to remove any more moisture.
So they equalize pretty quickly.
As the moisture migrates upwards to the colder attic areas during the winter months the relative humidity is increased to the point that condensation can occur on cold surfaces.
High humidity in an attic is usually caused by air leaks in the ceiling of the top floor of your house.
After from sealing things up and fixing your pressure balance this is usually the best solution to high humidity in a spray foamed attic.
Placing a dehumidifier inside the attic will help to draw out moisture from the surrounding environment.
Air sealing an attic.