Quote:
Originally Posted by calgarygeologist
Mostly comparing it to neighbouring garages which are exposed to the same environmental conditions. Our garage has rubber shingles and snow (our garage is also heated.) Neighbours all have asphalt and with the exception of one garage they all have unheated garages but their snow melted much quicker.
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If I had to guess what was gong on, it's that the warmer outside air we have been having moves through the soffits into the attic space, and helps melt the snow from below. But the rubber shingle is more insulating, so that interior heat isn't penetrating the rubber to melt it from below.