Frost In Attic In Winter

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 in attic in winter.

This winter s frigid weather in alberta could trigger more cases than last year of attic rain when warm moist air sneaks into the attic freezes then melts in warm spells like chinooks. 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. At times there was ice and frost on the nails. A point often overlooked is that since it s winter the water freezes on the cold nails.

My wife ali and i bought an old house 18 months ago. Boxes stored in the attic were sometimes wet. When the outside temperature rises again the frost thaws water collects and can leak into your house. That s about it pretty simple.

During winter conditions attic frost is a problem associated with attic bypasses. Ice frost and water in an attic condensation new construction text. The resulting thick layer of frost remained for several weeks until the weather warmed or a reasonable layer of snow covered the roofs to provide some insulation from the very cold exterior temperatures. This is why you see the frost.

This exact same process is happening in your attic during extreme cold weather. 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. The air in the attic has water in it and it condenses on the cold metal. That s about it pretty simple.

When moisture gets into the attic it condenses on the roof sheathing in the form of frost. 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. The nails that you see in your attic get as cold as the outdoor temperature. To start frost accumulates when moisture laden air from the house gets into the attic.

To start frost accumulates when moisture laden air from the. Frost accumulates in attics when moisture laden air from the house gets up there when it s cold. Why is there ice in my roof.