My Attic Has Frost

It can lead to mold wet insulation and find a way back into the home resulting in water stains on the ceiling.

My attic has frost.

Therefore my suggestion is that if one finds frost in the attic one first has to identify which of the three causes is contributing to the problem. Frost in your attic space is a sign that warm humid air is somehow getting into your attic space. Attic frost is the result of conditioned air leaking out of your home in the winter. What ends up as frost in the attic starts as water somewhere else in the house.

If it s due to air infiltration from the living space then air sealing should be the first thing you do not the last. Where the water comes from. Many people s first instinct when they notice frost in the attic is to add insulation. See the picture above.

That is not a solution. To start frost shows up in the attic when moisture laden air from the house gets into the attic. Since our minnesota winters are usually dry the only other source of humid air is your living space. That s about it pretty simple.

During winter conditions attic frost is a problem associated with attic bypasses. When the moisture gets into the attic it condenses on the roof. Insulation is irrelevant when your attic bypasses are left open for warm air to pour into the attic. Left unchecked moisture in the attic can lead to serious mold and decay expensive to repair and potentially unhealthy for anyone in the house.

The exhaust from the rooms below gets released into the open air in the attic if not sealed properly causing lots of moisture in the air.