GAF Timberline shingles weigh 240 to 360 pounds per square depending on the specific model. As of 2015, Timberline shingles are available in HD, 30 and 40 models.
Timberline 30 shingles weigh 240 to 250 pounds per square and have a have a 30-year warranty. Timberline 40 shingles weigh 260 to 270 pounds per square and come with a 40-year warranty. Timberline HD shingles weigh 360 pounds per square and have a lifetime warranty.
GAF constructs Timberline shingles from laminated asphalt and fiberglass. With a stone surface and an “A” fire rating, these shingles are available in barkwood, hickory and slate color schemes.