During winter conditions attic frost is a problem associated with attic bypasses.
Frost in attic during winter.
When that warm moist air meets the chilly underside of your roof s deck condensation occurs.
The more humid a house is the more frost you ll find in the attic.
A point often overlooked is that since it s winter the water freezes on the cold nails.
I ve blogged about attic air.
With it comes moisture.
The conditions that cause ice dams often cause attic condensation too.
Frost gets into the attic from air leaks or attic bypasses.
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.
In the winter attic condensation often turns into frost which actually doesn t pose any threat.
More indoor humidity more frost in the attic.
This can result in mold rust and deterioration of wood and structural fasteners.
House pressure affects.
As the moisture migrates upwards to the colder attic areas during the winter months the relative humidity is increased to the point that condensation can occur on cold surfaces.
When the outside temperature rises again the frost thaws water collects and can leak into your house.
The air in the attic has water in it and it condenses on the cold metal.
This moisture can seep into the structure of your home affecting roofing materials as well as framing and contents of your attic.
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.
You may pay an ice dam removal company to melt the ice dam off your roof only for the leaking to continue.
If you have a roof leak in the winter months and it s not being caused by ice dam there may be another culprit.
In the winter heat in your home rises to the attic.
This is why you see the frost.
When attics are not well ventilated moisture collects in this area of the home.
How to prevent frost in the attic frost comes from air leaks.
A tool like this shoots nails through shingles.
The tips of the nails are supposed to penetrate through the wood on your roof.
