Frost In The Attic Roof

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.

Frost in the attic roof.

Frost gets into the attic from air leaks or attic bypasses. More indoor humidity more frost in the attic. How to prevent frost in the attic frost comes from air leaks. The more humid a house is the more frost you ll find in the attic.

When the outside temperature rises again the frost thaws water collects and can leak into your house. When moisture gets into the attic it condenses on the roof sheathing in the form of frost. Frost itself doesn t do any damage but once it melts things get wet and then damage occurs. Melting frost can lead to deteriorated roof sheathing mold on the roof sheathing wet insulation and water stains on the ceilings.

Ventilation is not the way to fix frost in the attic. The fix for frost in the attic is sealing attic bypasses these are passageways from the conditioned household space to the attic. Frost itself doesn t do any damage but once it melts things get wet and then damage occurs. To suggest adding more ventilation to a roof to fix frost in the attic is like telling someone with a leaking water pipe to install a dehumidifier.

Melting frost can lead to deteriorated roof sheathing mold on the roof sheathing wet insulation and water stains on the ceilings. During winter conditions attic frost is a problem associated with attic bypasses. House pressure affects. I ve blogged about attic air.