Frost In Attic Rafters

That s about it pretty simple. 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. During winter conditions attic frost is a problem associated with attic bypasses.

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Some of it can cross the first rafter there but it doesn t seem to make it across the second rafter.

Frost in attic rafters.

What causes this type of moisture problem in the attic. Will it cause any harm. What s happening is that the rafters keep the warm air from migrating much. Near the ridge the frost free area extends over the garage a bit because warm air rises and it ends up near the ridge.

Notice though that there is some migration. The rafters are exposed. We still have one area in the rafters between the bathroom and a walk in closet that has some frost. The worst frost was on the other side though.

When the moisture gets into the attic it condenses on the roof. Frost accumulates in attics when moisture laden air from the house gets up there when it s cold. What causes this frost. Can i cure it.

When the outside temperature rises again the frost thaws water collects and can leak into. A few years ago we had a lot of frost and a company came in and charged us 250 to spray the exhaust fan and duct to stop leakage. Water vapor is migrating upward and eventually filtering into the attic. Attic insulation is in the floor of the attic rather than the roof.

How much frost should you have in an attic. How much dripping up there before we have. Our dryer vents up through the attic to the roof. As seniors with medical conditions we are worried about mould.

What you re looking at is evidence of excessive moisture in your house.

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