Snow on the roof
Is snow on the roof an indicator of insulation or its lack?
I've never been in my attic, so I have no idea about its insulation. However, I've noticed that the snow on my roof remains as deep as it is on the ground, but my neighbors' roofs seem to become snow-free a day or two after a snowfall. Also, I know my attached garage and attached three-season room have no insulation whatsoever (the roofing nails show through), and the snow over those areas remains the same as the snow on the roof of the rest of the house.
The house is a ranch, about 1500 sq ft., at the back of a cul-de-sac in SE Wisconsin, faces south, built in 1968.