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Why is there frost built up in my attic?

Have you ever experienced a roof leak on a sunny day in the middle of winter? It is probably from attic freeze or attic rain.
Frost and ice can form in attics when warm, humid air accumulates and condenses on the underside of your roof sheathing. Typically you will start to see this accumulate during extreme cold temperatures like we are having now. A little bit of frost forming is not unusual and typically doesn’t cause any major problems if it is able to melt and evaporate so the wood can dry.

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