Frost In Attic North Side

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.

Frost in attic north side.

John straube and chris schumacher answer the question why do i see frost in my attic the 12 days of building science is a project of rdh building science. Obviously the frost is caused by moisture in the attic air. A patch of frost here and there on the tips of roofing nails poking through the sheathing for instance probably isn t a cause for alarm. But anything more than an occasional patch is.

During winter conditions attic frost is a problem associated with attic bypasses. When the outside temperature rises again the frost thaws water collects and can leak into. You can t fully eliminate that moisture but you can try to limit it. The frost is on the north side since the south side receives more sunlight over the course of the day during winter in the northern hemisphere.

When the moisture gets into the attic it condenses on the roof. Why is there ice in my roof. Water or drip marks scattered on the attic floor. Upon inspection of the attic the entire north face of the attic had frost on the nails poking through and most of the decking boards.

Buckled or damaged roof sheathing. There is no snow on the roof. Left unchecked frost in an attic can lead to serious mold and decay. Moist or wet insulation.

Frost accumulates in attics when moisture laden air from the house gets up there when it s cold. We still have one area in the rafters between the bathroom and a walk in closet that has some frost. How does condensation get in the attic. There was also frost on the west wall on the north side of the dormer where the sun doesn t get to it this time of year.

As to the frost there are a few things you can check. A few years ago we had a lot of frost and a company came in and charged us 250 to spray the exhaust fan and duct to stop leakage. As seniors with medical conditions we are worried about mould. Moisture or frost on the roofs sheathing.

That s about it pretty simple. How much frost should you have in an attic.