About california ventilation building codes.
Frost on roof in 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.
Frost and ice forms in attics when warm humid air accumulates and condenses on the underside of your roof sheathing.
During winter conditions attic frost is a problem associated with attic bypasses.
Exhaust them with turbine vents.
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.
The frost itself doesn t do any damage but once it melts things get wet which is when the damage.
Mold mildew or rot can occur.
Left unchecked frost in an attic can lead to serious mold and decay.
Can sun get to the roof you will have either frost or water collecting.
When the weather warms up the frost will become water droplets and evaporate harmlessly.
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.
A well ventilated home is drier healthier and more comfortable.