5 ft. Extension, For use with all Snow Joe Roof Snow Rakes. Aluminum with snap button. Removing snow also relieves unnecessary weight on the roof which can damage the eaves. By using any of the Snow Joe roof rakes to safely remove snow from roofs, homeowners can prevent the damage of much-publicized ice dams. Ice dams cause water to back up under shingles, ruining roofs, ceilings and walls.