Frost In Attic Rafters

How much frost should you have in an attic.

Frost in attic rafters.

What causes this type of moisture problem in the attic. 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. What causes this frost. 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.

Near the ridge the frost free area extends over the garage a bit because warm air rises and it ends up near the ridge. Can i cure it. Our dryer vents up through the attic to the roof. How much dripping up there before we have.

Attic insulation is in the floor of the attic rather than the roof. The worst frost was on the other side though. Will it cause any harm. Frost accumulates in attics when moisture laden air from the house gets up there when it s cold.

That s about it pretty simple. The rafters are exposed. When the moisture gets into the attic it condenses on the roof. During winter conditions attic frost is a problem associated with attic bypasses.

We still have one area in the rafters between the bathroom and a walk in closet that has some frost. When the outside temperature rises again the frost thaws water collects and can leak into. As seniors with medical conditions we are worried about mould. What s happening is that the rafters keep the warm air from migrating much.

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