Are snow guards important on a metal roof? Yes, snow guards are an important feature for metal roofs, especially in Ontario where heavy snowfall is common. Metal roofs shed snow more easily than traditional shingles, which can cause large amounts of snow to slide off at once. Snow guards help control this movement and protect entryways, garages, landscaping, pets, and guests from falling snow. Without snow guards, accumulated snow can release suddenly in what is often called a “snow avalanche.” This can damage gutters, vehicles, or items placed close to the home. Snow guards work by holding snow in place and allowing it to melt gradually instead of sliding off all at once. Proper placement is important, and a professional roofing contractor will determine the best areas to install them.