The GAF System Plus Warranty provides strong, long-term protection for your roof. Single detached homes receive up to 50 years of non-prorated coverage, while all other structures are covered for 20 years non-prorated—meaning full material replacement if defects occur during that time. This warranty applies to the entire GAF roofing system, not just the shingles. It’s also only available through GAF-certified contractors, reflecting a commitment to proper installation and high-quality workmanship.