Frost In Attic New Home

When moisture gets into the attic it condenses on the roof sheathing in the form of frost.

Frost in attic new home.

To start frost accumulates when moisture laden air from the house gets into the attic. That s about it pretty simple. Frost in the attic comes from the house. Lots of ways many of which are small is difficult to detect.

Elevated attic humidity is typically the culprit behind attic frost. Attic rain is when you have an accumulation of frost from air entering the attic from the house. Warm air holds a lot of. 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.

Frost itself doesn t do any damage but once it melts things get wet and then damage occurs. 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. It s a problem known as attic rain warm moist air sneaks into the attic freezes during cold weather and then melts during warm. When the moisture gets into the attic it condenses on the roof.

How does humid air get from our house and into the attic. When the outside temperature rises again the frost thaws water collects and can leak into your house. That s about it pretty simple. Water vapors from the air will condense or shift from a gaseous state to a liquid state onto your building materials.

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. 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. Frost in your attic space is a sign that warm humid air is somehow getting into your attic space. To start frost shows up in the attic when moisture laden air from the house gets into the attic.

Turned out the water was coming from ice melting in the attic. 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.