A point often overlooked is that since it s winter the water freezes on the cold nails.
Frost in attic during winter.
House pressure affects.
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.
A tool like this shoots nails through shingles.
The tips of the nails are supposed to penetrate through the wood on your roof.
This moisture can seep into the structure of your home affecting roofing materials as well as framing and contents of your attic.
When that warm moist air meets the chilly underside of your roof s deck condensation occurs.
The conditions that cause ice dams often cause attic condensation too.
Frost gets into the attic from air leaks or attic bypasses.
The air in the attic has water in it and it condenses on the cold metal.
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.
I ve blogged about attic air.
Attic condensation generally happens during winter spring months when warm moist air from the main living area rises into the attic space.
You may pay an ice dam removal company to melt the ice dam off your roof only for the leaking to continue.
Ceiling water leaks are one of the classic signs of air leakage into the attic.
If you have a roof leak in the winter months and it s not being caused by ice dam there may be another culprit.
More indoor humidity more frost in the attic.
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.
With it comes moisture.
It looks like the roof is leaking but it s really the melting of a winter s worth of frost in the attic.
How to prevent frost in the attic frost comes from air leaks.
When the outside temperature rises again the frost thaws water collects and can leak into your house.
This is why you see the frost.
During winter conditions attic frost is a problem associated with attic bypasses.
The more humid a house is the more frost you ll find in the attic.