High Humidity Attic Summer

High indoor humidity in summer after replacing attic fiberglass batts with celluose insulation.

High humidity attic summer.

As planned the r 40 worth of insulation has drastically reduced his heating bill but now he faces another unexpected problem. Jason advani has insulated his attic with spray polyurethane foam and while his heating bills have dropped high humidity remains a problem. An overheated attic can bake asphalt shingles on the roof and cause them to deteriorate. In an attic like this wintertime ceiling condensation can form when cold air from the attic hits your warm ceiling.

The most common cause of ceiling condensation is an attic with too little insulation and ventilation. So if no sealing was done in the attic before cellulose was blown in then your pulling humidity from the attic into the envelope. An unventilated attic can reach 150 degrees in the heat of summer 50 degrees higher than it should be. In summer when the air conditioning is on the reverse happens.

Health issues caused by high humidity high levels can cause discomfort for most people particularly during summer. 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. Freezing and excessively hot outdoor temperatures rain and high exterior humidity levels make it difficult for your attic fan and heating and cooling systems to keep up with desirable attic. By scott gibson march 18 2019.

The main goal is to keep your attic temperature the same as the outside air temperature in the summer as well as in winter. However when it s humid out the environment interferes with this cooling process as our sweat does not evaporate easily in humid weather. Attic insulation and ventilation go hand in hand. When it s hot your body tries to cool itself naturally through sweating.

If there is excessive moisture accumulation in your attic it will condense on cold areas mainly on the underside of your roof deck. And the extra heat is not just a summer concern come winter hot attic air can melt snow on the roof during the day only to refreeze when temperatures drop overnight creating ice dams that lead. They keep your home cooler in the summer warmer in the winter and free from damage caused by moisture. June 2016 in indoor air quality.

Extra heat build up under the roof deck can cause your shingles to deteriorate much faster sometimes cutting their life expectancy in half. During the winter months the recommended relative humidity inside a house is anywhere between 30 50 percent.