Something i implied above but didn t say explicitly is that when frost forms on the roof the roof is below freezing.
Frost pattern on roof.
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However if nothing is different about your home compared to your neighbors you may have a problem.
Morning on the spring equinox the first day of spring brought a few gifts from winter.
Patterns on roof hood window and mirror.
After our recent record breaking snow here in the mid atlantic our house which i have been working on for over 3 decades had no icicles and lots of roof snow pack while my next door neighbor had melted patches in the roof snow pack and icicles almost instantly.
Closer building in foreground is unheated thus no odd pattern.
26f degrees nov 19 2014 6 45 am.
A well insulated attic floor will keep the heat in the home better making the roof thaw evenly.
2 the car roof cools radiatively.
This leaves a border of frost on the outside edges of the living area.
The roof of one car.
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Snow frost and dew pattern analysis is a technique used in conjunction with other tests such as an infrared scan to identify problems in the roof assembly insulation.
The presence of snow and frost melting patterns on a roof can indicate attic warming.
I film frost accentuated with hoar frost on the cars.
In other words the sequence might be as follows.
Gulf coast of mississippi.
The biggest tell tale i see are icicles hanging from gutters and roof overhangs.
A lack of frost can indicate that heat is leaking out through your attic space onto the roof and melting the frost.
Frost pattern on roof roofing gutters and all waterproofing anywhere.
The overhang porch and garage keep ice on them longer.
And the roof of another.
If the morning sun directly hits your home and not your neighbors lack of frost may just be attributed to the sun s heat.
1 initially the air and the car are at temperature 37 f and the dew point is 35.