Between GAF and TAMKO shingles, GAF is generally considered better overall for technology, contractor network, and warranty options, while TAMKO offers better value for budget projects. GAF is the largest roofing manufacturer in North America, known for Timberline HDZ which is the most installed shingle, featuring LayerLock technology, StrikeZone nailing area 600 percent larger for accurate installation, Dura Grip adhesive for 130 mph wind warranty, Dual Shadow Line for dimensional appearance, and StainGuard Plus algae protection with 25-year warranty. GAF has huge network of Master Elite contractors offering Golden Pledge warranty with up to 25-year workmanship coverage. GAF costs around 100 to 150 dollars per square materials. TAMKO is a smaller manufacturer based in Joplin, Missouri, known for Heritage series architectural shingles that offer good dimensional appearance and 110 to 130 mph wind warranty at lower cost around 80 to 110 dollars per square materials, making it 10 to 20 percent cheaper than GAF. TAMKO offers limited lifetime warranty and extended warranty through Pro Certified contractors. Quality wise, GAF is rated higher in contractor surveys for granule retention, durability, and overall track record. For most homeowners wanting best overall performance, widest availability, and strongest warranty support, GAF is better. For homeowners wanting decent quality at lowest cost for budget or rental properties, TAMKO is good value but not considered better than GAF overall.
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