Depending on the temperature and the insolation ie.
Frost build up in my attic.
Once you have sealed all of your leaks go ahead and add insulation or any other covering.
During winter conditions attic frost is a problem associated with attic bypasses.
Moist air will then flourish in the attic causing frost to form.
Even with adequate attic ventilation any escaping heat from the living space below will have moisture in it which can easily freeze during very cold days.
Installing an exhaust fan in your bathroom and kitchen will help eliminate moisture buildup while you shower or run the oven.
Inspect your attic for leaks.
When the outside temperature rises again the frost thaws water collects and can leak into your house.
Frost and ice forms in attics when warm humid air accumulates and condenses on the underside of your roof sheathing.
That s about it pretty simple.
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.
Inspect the entire attic area for leaks.
Another important step in preventing the build up of frost within the attic is to check for any heat leaks from the living space underneath.
Can sun get to the roof you will have either frost or water collecting.
The most efficient and longest lasting way to prevent air leaks is to have them sealed.
To start frost shows up in the attic when moisture laden air from the house gets into the attic.