Architectural (laminated/dimensional) shingles: fiberglass mat base, asphalt coating, ceramic granules. Weight: 240-400 lbs/square. ASTM D3462. Wind resistance: 110-130 mph (Class H or ASTM D7158). Fire: Class A (ASTM E108). Algae resistance: copper/zinc granules (AR designation). Impact: Class 4 available (ASTM D3161). Installation: 4-6 nails per shingle, starter strip, ice/water shield in valleys and at eaves in cold climates, 15 or 30 lb felt or synthetic underlayment. Exposure: 5-5/8 in typical. Slope: min 4:12 (2:12 with modified installation). Cost: $80-$150/square material, $350-$600/square installed. Lifespan: 25-40 years actual (30-50 year warranty). CSI 07 31 13. Brands: GAF, CertainTeed, Owens Corning, Atlas, IKO.