StainGuard Plus™ Algae Protection Limited Warranty

Protect your roof investment with powerful algae resistance

25-year limited warranty against blue-green algae discoloration*

Contractors, see how GAF Time-Release Algae-Fighting Technology helps protect a roof.

125-year StainGuard Plus™ Algae Protection Limited Warranty against blue-green algae discoloration is available only on products sold in packages bearing the StainGuard Plus™ logo. See GAF Shingle & Accessory Limited Warranty for complete coverage and restrictions.

 

Learn how the 25-year StainGuard Plus™ Algae Protection Limited Warranty may help you increase sales.

Complete the StainGuard Plus™ Algae Protection Limited Warranty Playlist on the GAF Learning Portal to learn more about GAF Time-Release Algae-Fighting Technology and why algae protection is important to your customers.

Learning Portal



GAF Time-Release Algae-Fighting Technology

Time-Release Algae-Fighting Technology is proprietary to GAF. Specially engineered capsules are infused throughout with thousands of copper microsites. These breakthrough capsules release algae-fighting copper efficiently, over time, for long-lasting algae-fighting power.

Protection homeowners want

In our survey of 500 homeowners, 87% said they found protecting their roof from blue-green algae very or extremely important.*

*Based on 2021 survey commissioned by GAF of 500 homeowners in areas with moderate to high amounts of blue-green algae.

Add algae protection from eave to ridge

Customers can now get the benefits of GAF Time-Release Algae-Fighting Technology and the StainGuard Plus™ Algae Protection Limited Warranty on qualifying shingles, ridge caps, and even visible starter strips.*

What is blue-green algae

The dark stains you see on roofs all over the U.S. and Canada are often caused by tiny cyanobacteria called Gloeocapsa magma — commonly known as blue-green algae. Help your customers understand how it works — and what they can do about it — with these targeted Learning Portal modules.

Blue-green algae vs moss. What's the difference?

The biggest differences between blue-green algae and moss are where they come from and how to get rid of them. Unlike blue-green algae, moss is a plant, which can do serious damage to your shingles. Blue-green algae is a bacteria which does little damage, but leaves nasty stains. GAF Time-Release Algae-Fighting Technology helps prevent the growth of blue-green algae.

Products with the 25-year StainGuard Plus™ Algae Protection Limited Warranty*: