Steep Slope Roofing

Owens Corning Announces Expanded Algae Resistance Warranty Coverage

Owens Corning is investing in the longevity of a roof’s curb appeal as it transitions shingle lines and all hip and ridge shingles to a 25-year Algae Resistance Limited Warranty (up from 10 years).

Covering most Owens Corning laminate shingles, including Oakridge® Series, Duration® Series, Berkshire®, Woodcrest®, and Woodmore®, the warranty uses a system approach that pairs proprietary shingle technology with hip and ridge components to help protect homes’ roofs against stains and streaks caused by blue-green algae for up to 25 years. To get the most protection (and this enhanced warranty), approved Owens Corning hip and ridge shingles will need to be installed alongside a new algae resistant laminate shingle roof.

Owens Corning achieved the long-term protection against blue-green algae by changing its advanced granule formulation. Paired with hip and ridge components, laminate shingles with StreakGuard™ Algae Resistance Protection are formulated to help protect against blue-green algae staining and discoloration for 25 years, contributing to a home’s long-term curb appeal. The combination of laminate shingles with hip and ridge components works to deliver protection against algae that covers the entire slope of a home’s roof.

“As homeowners want a great-looking roof and shingles that will stand up to blue-green algae formation over time, StreakGuard Protection with a 25-year algae resistant limited warranty protects both the beauty and longevity of a homeowner’s roof investment," said Jessica Tinney, product leader for Owens Corning’s Duration shingle line.

Algae is a particular challenge for roofs in warm, humid environments, especially in Southern regions. Caused by microorganisms from the family Gloeocapsa, blue-green algae tolerate drought and heat and can survive in a dormant state even during winter’s cold temperatures. Ink-like streaks on rooftops are accumulations of blue-green algae. As these microorganisms can be carried by the wind, blue-green algae can “spread” from house to house.

The StreakGuard Algae Resistance Protection with a 25-year algae resistant limited warranty is available starting in January 2023. Learn more and check market availability at owenscorning.com/en-us/roofing/streakguard.