Why Is There Frost On Some Roofs And Not Others

That heat loss can come from less insulation or from warm air leaking up through the ceiling.

Why is there frost on some roofs and not others.

When moisture makes contact with the freezer s evaporator coils located behind the back panel of the fridge or freezer it triggers. However if nothing is different about your home compared to your neighbors you may have a problem. That heat then conducts up all the way to the shingles. This simple answer is that the attics with no frost are warmer.

Your attic should generally be as close to the same temperature as the outside. Dew and frost are caused by condensing air from the atmosphere. A lack of frost can indicate that heat is leaking out through your attic space onto the roof and melting the frost. Because their ceiling isn t air sealed or insulated well enough to keep a lot of heat from escaping into the attic.

They are warmer because the attic is either poorly ventilated or poorly insulated or a combination of both. The overhang porch and garage keep ice on them longer. The attic is very cold almost the same temp as the outside air on a cold night when i go up there at night. As the temperature of the air drops it can t hold as much moisture and this moisture falls to the ground in the form of microscopic water droplets.

This leaves a border of frost on the outside edges of the living area. This is due to the cooling properties of evaporation and the inability of the glass and metal to retain heat. Here s a commercial site that illustrates and explains what s going on. In some cases frost forms even before the temperature drops below 32 degrees fahrenheit.

Frost formation frost will form on the car windshield and roof as the temperature drops below freezing. You may be able to troubleshoot the issue and be frost free. Once in the attic it warms the air over the living space. That warm air makes contact with the roof deck and warms it up.

If the morning sun directly hits your home and not your neighbors lack of frost may just be attributed to the sun s heat. Yes the absence of frost is an indicator of heat loss. A well insulated attic floor will keep the heat in the home better making the roof thaw evenly. Homes that let heat escape more rapidly than others will keep ice on the overhangs but not over the living area.

A combination of a poorly sealed attic floor and or inadequate insulation heats the roof deck and melts snow or eliminates frost. Regardless of the cause both situations are not good.