Westlake Royal Building Products™ Adds New D5 Vinyl Siding Options Across Royal® and Exterior Portfolio® Lines

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HOUSTON--(BUSINESS WIRE)--Feb 19, 2026--

Westlake Royal Building Products™ (“Westlake Royal”), a Westlake company (NYSE: WLK), has added new Double 5" (D5) vinyl siding options across its Royal ® and Exterior Portfolio ® brands, introducing the D5 profile within the Royal Estate™ line and the Exterior Portfolio Market Square ® line in all colors.

“As wider siding profiles gain increasing popularity in modern exterior design, these new additions bring forward a timely yet classic approach to curb appeal,” said Steve Booz, vice president of marketing, Westlake Royal Building Products. “With broader profile and color selections across the Royal and Exterior Portfolio lines, our expanded offerings allow for greater design flexibility without compromising on durability or performance.”

The D5 siding profile offers wider exposure and fewer horizontal lines, creating a classic, streamlined appearance well-suited for larger homes.

For the Royal Estate line, the D5 profile is debuting and will be available across the full ColorScapes ® palette, including Traditional, Premium and Dark colors. For the Exterior Portfolio Market Square line, the new D5 profile — previously offered only in light color options — will now be available in the entire palette of colors, delivering greater design flexibility.

The Royal and Exterior Portfolio vinyl siding lines provide the beauty of natural wood in a durable, low-maintenance format. Both lines feature Chromatix™ technology for long-lasting color protection, ensuring that dark shades don’t fade and eliminating the need for painting or staining. Offering lasting performance and style, each can withstand hurricane-force winds up to 170 mph, backed by an industry-leading Double Limited Lifetime Warranty.

For more information, visit the Royal Siding and Exterior Portfolio pages on the Westlake Royal Building Products website.

About Westlake Royal Building Products

Westlake Royal Building Products USA Inc., a Westlake company (NYSE: WLK), is a leader throughout North America in the innovation, design, and production of a broad and diverse range of exterior and interior building products, including Siding and Accessories, Trim and Mouldings, Roofing, Stone, Windows and Outdoor Living. Westlake Royal Building Products manufactures high quality, low maintenance products to meet the specifications and needs of building professionals, homeowners, architects, engineers and distributors, while providing stunning curb appeal with an unmatched array of colors, styles, and accessories.

For more information, please visitWestlakeRoyalBuildingProducts.com. Follow us onLinkedInandInstagramand “Like” us onFacebook.

View source version on businesswire.com:https://www.businesswire.com/news/home/20260219983526/en/

CONTACT: Media Contact:

Kelly Nguyen

Planit

[email protected]

609-385-6701Kriss Swint

Westlake Royal Building Products

[email protected]

KEYWORD: TEXAS UNITED STATES NORTH AMERICA CANADA

INDUSTRY KEYWORD: ARCHITECTURE RESIDENTIAL BUILDING & REAL ESTATE MANUFACTURING COMMERCIAL BUILDING & REAL ESTATE CONSTRUCTION & PROPERTY TEXTILES

SOURCE: Westlake Royal Building Products USA Inc.

Copyright Business Wire 2026.

PUB: 02/19/2026 09:00 AM/DISC: 02/19/2026 09:00 AM

http://www.businesswire.com/news/home/20260219983526/en