Owens Corning

Protect Your Home's Curb Appeal

Don't let black streaks lower the value of your home

Help keep your roof looking like new with the protection of Owens Corning 
StreakGuard™ Algae Resistance Protection. For more than 30 years, we've continued to advance our technologies to keep roofs beautiful and virtually maintenance free. Your roof accounts for more than one-third of your home's exterior. As a result, it has a dramatic impact on curb appeal.

Algae resistance on Owens Corning® shingles is made possible by using a specialized copper-lined granule from 3M, a leading producer of roofing granules.
A red brick house with a black and brown shingled roof and the StreakGuard logo in the corner.

The Owens Corning® Difference

Keep your roof looking like new

Your roof can account for up to 40% of your home’s exterior, so it has a dramatic impact on curb appeal. Don’t let algae growth ruin the exterior appearance of your home. Help keep your roof looking like new with the protection of Owens Corning® StreakGuard™ Algae Resistance Protection.

Owens Corning® Shingles with StreakGuard™ Algae Resistance Protection:

  • Helps inhibit the growth of algae1 to keep your home beautiful
  • Gives homeowner peace-of-mind based on decades of Owens Corning testing and experience with algae resistance protection
  • Is available on a wide variety of shingle styles and colours — ask your contractor for specifics
  • Has a 25-year Algae Resistance Limited Warranty2 for the following shingle lines: Oakridge® Series and Duration® Series

    To get the most protection and warranty, homeowners will need to use an approved Owens Corning Hip and Ridge shingle product: ProEdge® or,  DecoRidge®
1 Shingles are algae resistant to help control growth of algae and discolouration.

2 Installation must include use of an approved Owens Corning® Hip & Ridge Shingle product. See actual warranty for details.


A diagram of the granules used on roofing shingles made of mineral, copper and ceramic that prevent the growth of algae.

What is Algae Growth?

Algae species are naturally occurring and transported through the air to attach themselves to shingles and other surfaces. While algae growth can cause brown or black streaks on roofs, it doesn’t impact the performance of your shingles.

Streaks caused by algae growth are:

  • More common in warm, humid climates but can occur in all regions of the country.
  • Owens Corning® has continued to advance our algae resistance protection based on over 30 years of testing and experience.
  • Shingles with StreakGuard™Algae Resistance Protection can help inhibit the growth of blue-green algae3.
3 Shingles are algae resistant to help control growth of algae and discoloration.


A yellow house with a gray roof that has gray and black streaks caused by algae growth.

No matter where you live, we have the right shingle
for your home

Depending on where you live, there may be unique performance requirements for your roof, like protection against the damage from hail or the need for solar reflectivity. Or you may just want a bolder colour choice on your home.

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