ESTIMATE HOW MUCH THE SNOW ON YOUR ROOF WEIGHS USING THESE GUIDELINES FROM IBHS:
Fresh snow: 10-12 in. of new snow is equal to one in. of water, or about 5 lbs per square foot of roof space, so you could have up to 4 ft. of new snow before the roof will become stressed.
Packed snow: 3-5 in. of old snow is equal to one inch of water, or about 5 lbs per square foot of roof space, so anything more than 2 ft. of old snow could be too much for your roof to handle.
Total accumulated weight: two ft. of old snow and two ft. of new snow could weigh as much as 60 lbs per square foot of roof space, which is beyond the typical snow load capacity of most roofs.
Ice: one in. of ice equals one ft. of fresh snow.
Be aware and protect your investment so that you will not have to call us to protect it for you. If you experience a roof collapse and you need to protect your property and protect your assets from a collapsed roof call us for emergency security guard response at: 617.322.6372.