Frost In Attic New Home

Elevated attic humidity is typically the culprit behind attic frost.

Frost in attic new home.

Warm air holds a lot of. Water vapors from the air will condense or shift from a gaseous state to a liquid state onto your building materials. When the outside temperature rises again the frost thaws water collects and can leak into your house. To start frost accumulates when moisture laden air from the house gets into the attic.

John straube and chris schumacher answer the question why do i see frost in my attic the 12 days of building science is a project of rdh building science. The resulting thick layer of frost remained for several weeks until the weather warmed or a reasonable layer of snow covered the roofs to provide some insulation from the very cold exterior. To start frost shows up in the attic when moisture laden air from the house gets into the attic. That s about it pretty simple.

When the warm moist air in your attic cools with dropping temperatures the cooler air can no longer hold as much moisture. Since our minnesota winters are usually dry the only other source of humid air is your living space. Frost in your attic space is a sign that warm humid air is somehow getting into your attic space. When warm air from inside the house escapes traveling up through the bypasses the moisture condenses on the roof boards and rafters where the frost can form.

Usually takes extended periods of cold weather once the air warms or the sun shines on bare shingles the frost melts quickly raining down into the insulation and sometimes leaving staining and dripping from lights. Turned out the water was coming from ice melting in the attic. Frost in the attic comes from the house. When the moisture gets into the attic it condenses on the roof.

That s about it pretty simple. When moisture gets into the attic it condenses on the roof sheathing in the form of frost. During winter conditions attic frost is a problem associated with attic bypasses. It s a problem known as attic rain warm moist air sneaks into the attic freezes during cold weather and then melts during warm.

The warm air you are paying for to heat your home is leaking into the attic because your house is not sealed from the attic. Attic rain is when you have an accumulation of frost from air entering the attic from the house.