During winter months humidity from this escaping air can condense on cold attic surfaces leading to mold.
Humidity control in attic.
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Here is a link to an article that describes the work.
If you have too high humidity in your attic a dehumidifier is certainly a good idea.
The humidity in the basement measured 40 the first floor was 45 50 but the attic was 62.
The normal indoor humidity range in winter should be 15.
Ventilation is another key factor.
Over time this kind of damage can ultimately compromise the integrity of your roof any stored belongings and the overall structure of your home making attics more of a problem than a convenient place for extra storage.
High humidity in an attic is usually caused by air leaks in the ceiling of the top floor of your house.
Attics without proper temperature control can reach up to 150 degrees and cause major moisture buildup.
With outside temperatures ranging between 5 f and 95 f attic temperatures range between 48 f and 92 f.
Temperature attic temperature depends on the outside temperature and it also depends if your house is insulated.
Only about 10 of the hip roof is shaded so it gets plenty of direct sunlight.
Advani hopes to finish the attic and install a minisplit although he s not sure that will lower the humidity.
If you have high temperatures and high humidity in your attic then you may also have a problem with mold.
So the first step is to seal the air leaks.
During the spring summer and fall relative humidity rh in a spray foamed attic often exceeds the comfort threshold of 60.
You need to make sure there is adequate ventilation in your attic to allow warm moist air to escape.
Air sealing an attic.
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However you should also try to find out the root cause of the humidity.
The moisture was rising with the warm air of the home as it escaped past the insulation and it was trapped in the attic because there was no roof ventilation.
Below are some of the most common causes of high humidity in an attic.
Attic moisture usually appears because of condensation.
If you ve got a spray foamed attic and you ve got high humidity here s how to fix it for good.