Only select shingle manufactures feature shingles with Scotchgard™ Protector, made to deliver effective protection against the black streaks caused by algae.
Shingles with Scotchgard Protector feature:
+ A minimum 10% blend of 3M copper containing granules incorporated uniformly across the shingle surface. 3M science shows that a minimum 10% blend helps ensure effective copper ion coverage, helping to keep those black streaks off your roof in a variety of climates.
+ Uniform distribution of copper containing granules on the shingle and the hip and ridge. Algae can get established if there are gaps in copper ion coverage. Combining the 10% blend of copper granules with uniform distribution are essential in reducing the possibility of copper ion coverage gaps.
+ Tested by a third party laboratory. Every run of quality shingles featuring Scotchgard™ Protector is tested by a third party laboratory, thereby helping to ensure a minimum 10% blend of copper granules uniformly distributed across all Scotchgard™ Protector shingles.
+ The power of the Scotchgard Brand. A brand promise you can trust!
There is no denying the effect of the passage of time on your home. Replacing a roof is a considerable investment in both time and money. One way to help mitigate this investment is by using shingles featuring Scotchgard™ Protector to help prevent black streaks caused by algae.
The technology and potential behind Scotchgard™ Protector was discovered by an accidental spill in the labs of 3M. Several decades later the Scotchgard brand was born, encompassing multiple products that repel water and block stains on fabrics, furniture, carpet and even cars. For roofing granules, the Scotchgard Protector Shingle System using 3MTM Copper Granules helps prevent black streaks caused by algae growth. These shingles help keep your roof looking as beautiful and colorful as the day you bought your house.
Select manufacturers across the country produce shingles featuring Scotchgard Protector for certain algae resistant shingles. By meeting the minimum of 10% copper-containing granules distributed uniformly across the shingle surface, these shingles help protect against black streaks. Choosing which shingles to buy for your roof can be challenging. By choosing shingles featuring Scotchgard Protector you're not just buying a product, you're buying a brand promise to protect the original style and beauty of your shingles against black streaks for 20 years!
Algae growth is caused by water and moisture, therefore roofs found in regions that receive more rain have a higher chance of developing algae growth than those that do not. The map to the left denotes precipitation levels across the nation. States that are colored dark have a higher potential for black streaks caused by algae where shingles featuring Scotchgard™ Protector could be most effective.
Potential for black streaks caused by algae. Based on US average Annual Precipitation and Dew Point Data.
“The Science behind 3M copper-containing granules is based on principles of copper ion leach rates. While the teams experimented with a variety of solutions decades ago using other metals and materials, we discovered copper-containing granules to be a highly effective method to help prevent the black streaks caused by algae and we continue that science today with active research programs on shingle test decks and roofs in a variety of locations”
Rachael Gould Ph. D.
Senior Technical Service Specialist
3M Industrial Mineral Products Division