Why Is My Attic So Humid

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

Why is my attic so humid.

Why is that a problem. Our dehumidifier mostly dried out the attic so now it costs far less than the original 100 month to operate. A moist attic means moist insulation and moist insulation is less effective. The warm humid air from your house particularly the bathroom rises up into the attic and condenses on the cold roof sheathing.

You need minimum 27 of ridge vent with equal intake ventilation. Rising damp is a rarer but more serious cause of high humidity in a home. Why does condensation mold form in my crawlspace. You have a 860 sq ft attic.

If you raise the attic temperature the rh in both places would be the same. Condensation accumulates and leads to structural problems such as dry rot and deterioration in wooden beams. You d need a minimum of 9 16 x8 soffit vents or 54 of continuous soffit vent or 54 vented drip edge. If the problem is the result of water or moisture penetrating the foundation or floor slab there are many remedial actions which may help.

Keep an eye out for symptoms of rising damp such as mold rotting window frames flaky plaster or damp or wet patches on your walls. By blowing new air into your attic you might positively pressurize the space. Attic temperature and humidity levels are also important. Rising damp occurs when moisture from the ground rises through the pores in the bricks and masonry.

These can include installation of seamless gutters and downspouts. That will create an incredibly uncomfortable environment in your home and can even cause nose bleeds. The cobra vent can become clogged but it s not likley. But we can t leave it a week without the dehumidifier running that s all it takes to.

Heat exhaustion can be a result of a living in a too humid home. So if you don t run your air conditioner much during the spring and fall humidity will continue to build up in your your attic. The best solution for controlling moisture is at its source. It s easy to check and clean if necessary.

The issue in the attic is that at 48 degrees f. Because dry air that makes it inside your home is never going to be more humid it s going to stay dry. After you ve started sweating the excess moisture trapped in a humid home keeps the sweat on your skin instead of letting it naturally evaporate. If it doesn t evaporate fast enough the moisture content of the wood increases providing a cozy growing environment for mold.

Then there s the question of pressure. For starters your ac will only dehumidify the attic while it s running. You may become dehydrated as you lose moisture through your skin.