High Humidity In Attic

Humidity inside a home should be maintained between 30 and 60 relative humidity.

High humidity in attic.

This is exactly how water accumulates in your gas tank by the way the scientist next door. If there is excessive moisture accumulation in your attic it will condense on cold areas mainly on the underside of your roof deck. Proper ventilation will help maintaining a constant temperature in your attic. That along with proper insulation should take care of the moisture problem.

If water is running down the window or objects seem wet to the touch then the humidity is far too high. At 140 f 80 humidity corresponds to 120 torr or 16 of atmospheric pressure. The dew point and rh get up close to 90 f and 90. By scott gibson march 18 2019.

That s way too high. Attics can get hot and humid during the summer especially when the outside air leaks in. Outside air moves into the attic leaves its moisture behind amd moves on. You should focus first on preventing moisture and warm air from entering the attic from the living space.

So compared to that hot humid attic the vapor pressure at the other side of the foam is a factor of six higher. The dew point and rh stay below 70 f and 70 at their peak the peak of humidity not the peak height in the attic. During the winter months the recommended relative humidity inside a house is anywhere between 30 50 percent. High humidity in attic.

To alleviate high humidity you need to have the best dehumidifier for an attic that can prevent the excess moisture from flowing in. As planned the r 40 worth of insulation has drastically reduced his heating bill but now he faces another unexpected problem. You can check the humidity level by observing the windows and the objects in the attic. The normal indoor humidity range in winter should be 15 to.

However you need to have a specific dehumidifier for the job. Causes of high indoor relative humidity low heat load short equipment run time system oversizing. In contrast the humidity near the ridge in the attic gets very high. If the attic is at 80 f and 80 humidity that s about a 21 torr vapor pressure of water.

High humidity means greater chances for mold to grow. Sealing attic hatches duct work recessed lighting venting bath fans to exterior etc. Jason advani has insulated his attic with spray polyurethane foam and while his heating bills have dropped high humidity remains a problem.