What is the pitch of the roof? Is it engineered for your snow and wind load in your area? How big of a roof?
The reason I ask is we have a couple shed roof barns that are only like 2/12 or maybe 1.5/12 and they shed snow pretty well, we maybe get a little more sunlight soon after the storms pass than you do up in the north pole though. I wouldn't worry about it really, not unless you can find some Chevy Chase National Lampoon super slickem saucer sled spray
