--- title: "Westlake Royal Building Products™ Introduces 5/8” Lap Siding Profile for TruExterior® Siding & Trim | WLK Stock News" type: "News" locale: "en" url: "https://longbridge.com/en/news/276063161.md" description: "Westlake Royal Building Products has launched a new 5/8” Lap Siding profile for its TruExterior® Siding & Trim line, combining traditional aesthetics with high-performance poly-ash material. This product mimics the look of cedar while offering durability and low maintenance. It has been recognized as a finalist for the 2026 Best of IBS™ Awards in two categories: “Best Outdoor Product” and “Most Innovative Building Material.” Westlake Royal is a leader in building products across North America, focusing on innovation and quality." datetime: "2026-02-16T06:00:00.000Z" locales: - [zh-CN](https://longbridge.com/zh-CN/news/276063161.md) - [en](https://longbridge.com/en/news/276063161.md) - [zh-HK](https://longbridge.com/zh-HK/news/276063161.md) --- > Supported Languages: [简体中文](https://longbridge.com/zh-CN/news/276063161.md) | [繁體中文](https://longbridge.com/zh-HK/news/276063161.md) # Westlake Royal Building Products™ Introduces 5/8” Lap Siding Profile for TruExterior® Siding & Trim | WLK Stock News _TruExterior 5/8” Lap Siding Named Best of IBS™ Finalist in “Best Outdoor Product” and “Most Innovative Building Material Product” Categories_ HOUSTON--(BUSINESS WIRE)--Westlake Royal Building Products**™** (“Westlake Royal”), a Westlake company (NYSE: WLK), is expanding its line of TruExterior® Siding & Trim with the addition of a 5/8” Lap Siding profile. The new profile combines the coveted appearance and shadow lines of traditional lap siding with the high-performance attributes of TruExterior’s poly-ash material. It has a true 5/8” butt and a sought-after aesthetic that mimics real cedar. “Not only does TruExterior Lap Siding meet demand for a popular, timeless style, it also emulates the thickness and shadow lines of cedar in a way few other manmade products are able to accomplish,” said Steve Booz, vice president of marketing at Westlake Royal Building Products. “The result is remarkable authenticity and enduring beauty alongside low maintenance and long-term durability.” Like all TruExterior Siding & Trim profiles, 5/8” Lap Siding is made of poly-ash, a proprietary blend of polymers and fly ash that provides for a high level of dimensional stability and resistance to warping, cracking and splitting. As a result, the siding requires no sealing of ends or cuts in the field, it can be used for ground-contact applications, and it can be painted any color, including dark hues. TruExterior offers workability similar to wood and does not require special tools for cutting. Installers can fasten TruExterior close to the edge, eliminating the need to worry about mushrooming and pre-drilling. As a result of its authentic look and advanced material engineering, the TruExterior 5/8” Lap Siding profile has been selected as a finalist for the 2026 Best of IBS™ Awards in two categories: “Best Outdoor Product” and “Most Innovative Building Material.” Hosted annually by the NAHB International Builders’ Show® (IBS), the Best of IBS Awards recognize the most outstanding building products across the residential construction industry. To learn more about TruExterior Siding & Trim, please visit 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 visit_ _WestlakeRoyalBuildingProducts.com__. Follow us on_ _LinkedIn_ _and_ _Instagram_ _and “Like” us on_ _Facebook__._ View source version on businesswire.com: https://www.businesswire.com/news/home/20260216966724/en/ **Media Contact: **Kriss Swint Westlake Royal Building Products Kswint@Westlake.com Source: Westlake Royal Building Products ### Related Stocks - [Westlake Corporation (WLK.US)](https://longbridge.com/en/quote/WLK.US.md) ## Related News & Research - [Westlake Royal Building Products™ Adds Column Wraps and New Color to Grove Collection™ Trim Line | WLK Stock News](https://longbridge.com/en/news/276142443.md) - [Westlake (WLK) Valuation Check After Weak 2025 Results And Leadership Changes](https://longbridge.com/en/news/278199749.md) - [Planning an Outdoor Digging Project this Spring? 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