StainGuard Plus™ Algae Protection Limited Warranty

Protect your roof investment with algae resistance so powerful it allows us to offer a 25-year limited warranty* against blue-green algae discoloration on many of our most popular products, including Timberline HDZ® Shingles.

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

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*25-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.*

See Warranties

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.

LEARNING PORTAL

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.

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

Select Timberline Shingles

Timberline HDZ^®, Timberline® AS II, Timberline^® CS, & Timberline^® UHD

Select Designer Shingles

Grand Canyon^®, Grand Sequoia^®, Grand Sequoia^® AS, Camelot^® II, Slateline^®, & Woodland^®

Select Ridge Cap Shingles

TimberTex^®, TimberCrest^®, Ridglass^®, Seal-A-Ridge^®, Z^® Ridge & Seal-A-Ridge^® AS

Select Starter Strip Shingles

StarterMatch^®