Frost In Attic Melting

If you ve ever experienced a leaky roof when it s not raining this is often the symptom of frost melting in the attic and this should be investigated before worrying about getting on the roof to examine seals and shingles.

Frost in attic melting.

I ve blogged about attic air. Then it freezes against the wood and all of a sudden you have frost. During winter conditions attic frost is a problem associated with attic bypasses. When moisture gets into the attic it condenses on the roof sheathing in the form of frost.

This post is largely a re blog of my last post on attic frost but that was from 2013 and it s time for a reminder about all of this. Frost and ice can go straight from a solid state to a vapor and cold outside air is frequently very dry. Melting frost can lead to deteriorated roof sheathing mold on the roof sheathing wet insulation and water stains on the ceilings. The more humid a house is the more frost you ll find in the attic.

Why is there ice in my roof. Received 33 votes on 30 posts. Then the air condensates on the wood of the interior of your roof which is the coldest part of the attic. It s rarely enough to cause a problem because the insulation sucks it up small quantities of water like a dry sponge.

While crawling in attics i often see a few drips here or there in the insulation where you can see evidence of minor frost melt. Melting frost can lead to deteriorated roof sheathing. Frost gets into the attic from air leaks or attic bypasses. If the ventilation is working and the source of moisture has been eliminated the current frost and moisture will evaporate hopefully before it melts and drips.

The humid air in your home rises to the top of your home the attic when the temperature gets too low. House pressure affects. 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. How to prevent frost in the attic frost comes from air leaks.

Frost itself doesn t do any damage but once it melts things get wet and then damage occurs.