CertainTeed has previously faced high-profile class-action lawsuits and settlements regarding older organic-mat asphalt shingle lines (such as Horizon and older organic variants) that experienced premature blistering or cracking. While those historic organic lines are subject to settled claims programs running through the decade, contemporary fiberglass-based shingles are manufactured under updated quality standards, though legal watchdogs occasionally scrutinize specific older fiberglass product lines for adhesive issues.
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