Frost On Roof

Homes that let heat escape more rapidly than others will keep ice on the overhangs but not over the living area.

Frost on roof. Melting frost can lead to deteriorated roof sheathing mold on the roof sheathing wet insulation and water stains on the ceilings. A lack of frost can indicate that heat is leaking out through your attic space onto the roof and melting the frost. That s about it pretty simple. Does your garage have a frosted roof and the rest of your home does not or vice versa.

Some people have wondered about that sharp dividing line between the frosty roof over the garage and the not so frosty roof over the living space. Frost and moisture attic frost. Warm shingles don t allow frost to form as readily as cold shingles. During winter conditions attic frost is a problem associated with attic bypasses.

Frost itself doesn t do any damage but once it melts things get wet and then damage occurs. When the moisture gets into the attic it condenses on the roof. And here s the clincher. A well insulated attic floor will keep the heat in the home better making the roof thaw evenly.

Frost comes from air leaks. The overhang porch and garage keep ice on them longer. Frost accumulates in attics when moisture laden air from the house gets up there when it s cold. Look at the entirety of your roof is the frost melting unevenly and not due to the sun s heat.

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.