When the moisture gets into the attic it condenses on the roof sheathing in the form of frost.
Frost on roof in attic.
Ice frost and other condensation need to be removed from your attic.
Well placed windows doors and other openings allow air to circulate without creating.
When the outside temperature rises again the frost thaws water collects and can leak into your house.
About california ventilation building codes.
Exhaust them with turbine vents.
Frost and ice forms in attics when warm humid air accumulates and condenses on the underside of your roof sheathing.
Can sun get to the roof you will have either frost or water collecting.
A patch of frost here and there on the tips of roofing nails poking through the sheathing for instance probably isn t a cause for alarm.
Mold mildew or rot can occur.
A well ventilated home is drier healthier and more comfortable.
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.
When the weather warms up the frost will become water droplets and evaporate harmlessly.
Depending on the temperature and the insolation ie.