Bypasses are what allow moisture in the attic to begin with and this is what needs repair.
Frost in attic space.
Frost in your attic space is a sign that warm humid air is somehow getting into your attic space.
How does humid air get from our house and into the attic.
When moisture gets into the attic it condenses on the roof sheathing in the form of frost.
The frost itself doesn t do any damage but once it melts things get wet which is when the damage.
When the outside temperature rises again the frost thaws water collects and can leak into your house.
While bypasses are certainly the most common cause of frost there are other ways it can happen and these are much more obvious.
Frost itself doesn t do any damage but once it melts things get wet and then damage occurs.
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.
Since our minnesota winters are usually dry the only other source of humid air is your living space.
When the moisture gets into the attic it condenses on the roof sheathing in the form of frost.
The fix for frost in the attic is sealing attic bypasses these are passageways from the conditioned household space to the attic.
Can sun get to the roof you will have either frost or water collecting.
Depending on the temperature and the insolation ie.
Frost and ice forms in attics when warm humid air accumulates and condenses on the underside of your roof sheathing.