Discontinued shingles · 2026-W44

week of October 26, 2026: WeatherGuard 40, Stormmaster Slate, Highland Slate

5 discontinued asphalt shingle lines from the Library this week: Owens Corning WeatherGuard 40, Atlas Stormmaster Slate, CertainTeed Highland Slate, CertainTeed Sealdon 25, GAF Grand Slate. Members see every swatch, picture and document on each line, and can issue a cited identification report.

Owens Corning

WeatherGuard 40

architecturalDiscontinued · 200739-3/8 x 13-1/4

First documented 2002, discontinued 2007.

Manufacturer notice: Owens Corning Shingle Product Line - Current and Discontinued (2023)

In the Library: 2 bulletins. Open the full record

Stormmaster Slate in Blackstone Slate
Atlas

Stormmaster Slate

designer/specialtyDiscontinued · 202322-11/16 x 18-1/2, exposure 8-1/2

First documented 2014, discontinued 2023. effective January 1, 2023.

Manufacturer notice: Atlas Product Announcement - StormMaster Slate Discontinuance (Jan 2023) · effective January 1, 2023

In the Library: 6 colours, 10 pictures, 2 bulletins · colours include Blackstone Slate, Chalkstone Slate, Emerald Slate, Hearthstone Slate, Pewter Slate, Weathered Slate. Open the full record

Highland Slate in Black Granite
CertainTeed

Highland Slate

designer/specialtyDiscontinued · 201836 x 18, exposure 8

First documented 2010, discontinued 2018. 2018; supplied while stocks last.

Manufacturer notice: CertainTeed letter 12/1/2022: 2023 product changes, Shakopee/Jonesburg service area (Central)

In the Library: 7 colours, 5 bulletins · colours include Black Granite, Fieldstone, Max Def Weathered Wood, New England Slate, Smokey Quartz, Tudor Brown, Venetian Red. Open the full record

Sealdon 25 in Evergreen Blend
CertainTeed

Sealdon 25

3-tabDiscontinued · 200536 x 12, exposure 5

First documented 2002, discontinued 2005. end of 2005.

Manufacturer notice: CertainTeed TIS #151 Discontinued and/or Modified Products (rev. 10/21/2021) · end of 2005

In the Library: 10 colours, 4 pictures, 4 bulletins · colours include Black, Cinnamon Frost, Evergreen Blend, Gray Frost, Nickel Gray, Sandalwood, Star White, Timber Blend. Open the full record

Grand Slate in Aged Oak
GAF

Grand Slate

designer/specialtyDiscontinued · 201340 x 17, exposure 7-1/2

First documented 2003, discontinued 2013. effective immediately, notice 3/25/2013.

Manufacturer notice: GAF Discontinued Shingle List (+ 4/4/2019 Camelot Ultra & Sienna notice) · March 25, 2013

In the Library: 6 colours, 31 pictures, 3 bulletins · colours include Aged Oak, Bristol Gray, Essex Green, Middlebury Brown, Sheffield Black, Welsh Gray. Open the full record

Years come from the dated documents the Library holds; a line may be older than its first document. Discontinuation facts come from the manufacturer's own notices.

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