Frost Heaters In Attics

When the moisture gets into the attic it condenses on the roof.

Frost heaters in attics.

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. Check out my post on moldy attics for some. In cold climates that leads to ice dams. To start frost shows up in the attic when moisture laden air from the house gets into the attic.

Over the other units enough heat escapes into the attics to melt most of the snow. 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. Frost gets into the attic from air leaks or attic bypasses.

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. I ve blogged about attic air leaks many times and i ve shared photos of attic air leaks. Over that third unit from the left there s little heat getting into the attic as evidenced by the unmelted snow. That s about it pretty simple.

All of these anomalies are a sure sign that condensation from heat loss is an issue. Frosty roof deck nails and sidewall.