High Humidity In Attic

However you need to have a specific dehumidifier for the job.

High humidity in attic.

So compared to that hot humid attic the vapor pressure at the other side of the foam is a factor of six higher. Causes of high indoor relative humidity low heat load short equipment run time system oversizing. Sealing attic hatches duct work recessed lighting venting bath fans to exterior etc. Humidity inside a home should be maintained between 30 and 60 relative humidity.

Jason advani jason advani thought he was on the right track when he insulated the bottom of the roof deck in his walk up attic with closed cell spray foam. That along with proper insulation should take care of the moisture problem. Outside air moves into the attic leaves its moisture behind amd moves on. That s way too high.

If the attic is at 80 f and 80 humidity that s about a 21 torr vapor pressure of water. As planned the r 40 worth of insulation has drastically reduced his heating bill but now he faces another unexpected problem. I like to shoot for 50 in humid climates when possible and by possible i mean financially feasible for the customer because anything is possible. To alleviate high humidity you need to have the best dehumidifier for an attic that can prevent the excess moisture from flowing in.

Jason advani has insulated his attic with spray polyurethane foam and while his heating bills have dropped high humidity remains a problem. If water is running down the window or objects seem wet to the touch then the humidity is far too high. You should focus first on preventing moisture and warm air from entering the attic from the living space. Attics can get hot and humid during the summer especially when the outside air leaks in.

At 140 f 80 humidity corresponds to 120 torr or 16 of atmospheric pressure. In contrast the humidity near the ridge in the attic gets very high. The dew point and rh get up close to 90 f and 90. If there is excessive moisture accumulation in your attic it will condense on cold areas mainly on the underside of your roof deck.

Humidity settings are another issue that can make or break the performance of your heating and cooling systems and your attic ventilation. The normal indoor humidity range in winter should be 15 to. By scott gibson march 18 2019. High humidity in attic.

This is exactly how water accumulates in your gas tank by the way the scientist next door. High humidity means greater chances for mold to grow. During the winter months the recommended relative humidity inside a house is anywhere between 30 50 percent.