Reduce Moisture In Attic

The difference in the two spaces is the dry bulb temperature.

Reduce moisture in attic.

Well you ve got to manage your moisture as you re well aware and the best way to do that in an attic is with a combination of roof vents. Proper ventilation can help circulate the air reduce the heat build up in the attic and keep down humidity levels. Look for can lights gaps around boots into the space holes in walls between the attic and crawl space and the living space etc. Here is a link to an article that describes the work.

If you raise the attic temperature the rh in both places would be the same. 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. So they equalize pretty quickly. Simply by sealing the various possible paths of air leakage already discussed infiltration will be reduced therefore restricting the movement of air and eliminating the stack effect.

The federal housing administration has recommendations for the amount of ventilation you will need based on the size of your home. This can reduce moisture as well as the temperature in the attic which can make it far more difficult for mold and mildew to gain a foothold in the space. If your attic features a window open it as well. During winter months humidity from this escaping air can condense on cold attic surfaces leading to mold.

Sealing these can greatly reduce the moisture drivers. Right now we just have eave vents and gable vents. Do you have a ridge vent right now. If you live in a warmer climate you may want to air out your attic twice a week.

Check seals sweeps weather stripping around doors and windows make an assessment if the equipment may be significantly oversized. You want to use a ridge vent that goes down the peak of the roof. Proper precaution in an uninsulated attic such as the department of energy s recommended r30 to r49 insulation for warm climates r30 to r60 for moderate climates and r49 to r60 for cold climates. So the first step is to seal the air leaks.

Once a week open your attic door and leave it open for several hours. Open windows and use ceiling fans to keep the air circulating in your home and avoid stuffiness. Ventilating this space can also reduce heat that radiates up through the roof and down into the living areas of the home. Air sealing an attic.

These conditions prevent warm damp air from migrating to the attic in the first place. After moisture penetration is controlled as best as possible the next approach to reducing attic moisture is by controlling air infiltration.