1. Eave protection refers to a layer of felt paper or plastic that is under the shingles on the edge of your roof. This would extend from the bottom of the roof, a minimum of 12 inches past the exterior wall. On most houses this would be approximately 3 ft. This is the part of your house where most of the heat escapes from the house's outer wall, causing ice-damming. So that is why this area gets extra protection.
At Sunik, we prefer to use a minimum of 50 lb. roll roofing, as per our manufacturers specification.