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.
Frost in attic north side.
We have a 20 year old two story house with a full basement.
These signs can vary contingent on the catalyst of the problem and are generally worse on north facing or shady sides of roofs.
That s about it pretty simple.
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.
In cool months the north side of the roof boards in the attic would be covered with water frost or even ice.
The insulation wasn t great.
Moisture or frost on the roofs sheathing.
Moist or wet insulation.
But anything more than an occasional patch is.
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.
When the outside temperature rises again the frost thaws water collects and can leak into.
Obviously the frost is caused by moisture in the attic air.
Frost in attic north side.
During winter conditions attic frost is a problem associated with attic bypasses.
Water or drip marks scattered on the attic floor.
What causes this type of moisture problem in the attic.
You can t fully eliminate that moisture but you can try to limit it.
Frost accumulates in attics when moisture laden air from the house gets up there when it s cold.
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.
Our dryer vents up through the attic to the roof.
Why is there ice in my roof.
How does condensation get in the attic.
As to the frost there are a few things you can check.
We discovered that the two underpowered bathroom fans were venting on top of the soffit that had perforations.
Buckled or damaged roof sheathing.
When the weather warms up the frost will become water droplets and evaporate harmlessly.
Left unchecked frost in an attic can lead to serious mold and decay.
The worst frost was on the other side though.