Frost In Attic Melting

Melting frost can lead to deteriorated roof sheathing mold on the roof sheathing wet insulation and water stains on the ceilings.

Frost in attic melting.

It s rarely enough to cause a problem because the insulation sucks it up small quantities of water like a dry sponge. Received 33 votes on 30 posts. How to prevent frost in the attic frost comes from air leaks. 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.

House pressure affects. During winter conditions attic frost is a problem associated with attic bypasses. I ve blogged about attic air. 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.

More indoor humidity more frost in the attic. When moisture gets into the attic it condenses on the roof sheathing in the form of frost. Why is there ice in my roof. Frost itself doesn t do any damage but once it melts things get wet and then damage occurs.

Then it freezes against the wood and all of a sudden you have 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.

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. 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. When a warm sunny day arrives after a long cold stretch and it seems like you have a roof leak when there isn t a cloud in the sky it s probably attic icing otherwise known as ice dams or ice damming and the surprising thing is that it s very unlikely that the roof covering itself is the problem. Then the air condensates on the wood of the interior of your roof which is the coldest part of the attic.

The more humid a house is the more frost you ll find in the attic.