David Deschaine, who owns a roofing and siding company, said that when one inch of snow falls, a single square foot weighs about a pound.
Sometimes that can add up to thousands of pounds, which can be dangerous and cause damage.
Deschaine recommended clearing the entire roof but said that the three to six feet around the edge are crucial.
"Typically if you don't clear the snow off the edge of the roof, get all that snow off the edge," he said. "If you don't progressively work up the roof, it works its way up under the shingles and before you know it, it's coming inside."
Deschaine said those who plan to clear their own roofs after the storm should be very careful.