in my opinion, leave the snow on your roof alone, when was the last time you heard or saw a pitched roof cave in? Yes maybe old garage or sheds, but that’s it. If you have leaking problems that’s different, be very careful remove snow from the eaves and valleys. I did this as a xtra job when I was a young guy. Lots of damage done to shingles doing this believe me, and if you fall?, no fishing this summer. 2 ft of snow on my roof right now, Walker, Mn area. Spring will come