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Mike and Dave spent the entire morning shovelling roofs. In the afternoon, they finally got to Clover Cottage. Check out how deep that snow is.
While an individual flake really won't tip the scales (unless you have teensy tiny scales) when you stack the stuff up, it starts to compound the math. Light fluffy snow weighs about 7 lbs/cubic foot. As it compacts, it gets closer to 50 pounds. Per cubic foot. That's why the building code is so stringent for areas that get snowfall.
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This is not a job for the faint of heart of the unbalanced of torso. Shovelling roof snow is a dangerous job -- it involves height, weight and slippery footing, so it is best to get someone who know what they are doing.
My dad did that regularly with the roof. The key was not letting it accumulate.
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