25 Years of Vinyl Siding Certification

The Vinyl Siding Institute recently marked the 25th anniversary of its Product Certification Program, an important tool for buyers and specifiers to identify siding materials that are code compliant and high quality. Products listed under VSI’s Product Certification Program are tested and validated by an independent ISO/IEC 17065 accredited third-party certification body to deliver superior protection and meet and exceed international code standards.

“The program’s goal was standardizing the industry as a whole so that all manufacturers were on a level playing field and that products were consistently produced and distributed to the standards established,” explained Sara Krompholz, VSI’s senior director of technical and certification. “The program was also designed to achieve greater consumer confidence.”

VSI Certified Products provide quick, at-a-glance verification of code compliance, eliminating the need for specifiers to research manufacturer documentation. The products also are tested and proven to stand up to harsh conditions. The program certifies traditional vinyl siding, insulated vinyl siding, and polypropylene siding.

The Evolution of Vinyl Siding Certification

According to VSI, the organization has continued to expand and refine the Certified Products Program as the market has required. This includes adding standards for color in 2006 and adding wind-load testing in 2008. And in 2021, VSI relaunched the program as an independent third-party program with ISO/IEC 17065 accreditation, with Intertek as the certification body. With this change, products in the program must carry a Product Certification Listing (PCL) declaring that it complies with recognized standard. An optional Product Evaluation Report (PER), which denotes that a product meets recognized standards and requirements for building codes, is also available.

VSI says it will continue to evaluate, refine, and adapt the Product Certification Program as it moves forward. “The sky’s the limit,” said Krompholz. “We are continuing to evolve and expand our scope as evidenced by the addition of backed siding. We are working on recognizing Canadian certification to the National Building Code of Canada (NBC). In the future, we might consider adding accessories and other PVC-related materials, and a scheme has been written to allow us to include expansion opportunities, which could also expand membership.”

Westlake Royal Building Products Certified Under VSI’s Program

Nearly all vinyl siding products from Westlake Royal Building Products are certified under VSI’s Product Certification Program. These include:

For more details on Certified Products, visit the VSI certified products listing and search “Westlake.”

To view products, browse idea galleries, and order samples, visit Westlake Royal Siding Solutions™.

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Vinyl Siding: A Surprising Way to Go Green

Exterior Portfolio vinyl siding

Most people don’t consider vinyl an eco-friendly building product, but data show it actually is. There are misconceptions that vinyl siding doesn’t have sustainable design, production, or operations. But vinyl outperforms almost all other common cladding materials, including fiber cement and brick, in total environmental impact.

While the classic look of wood is forever timeless, new developments in design allow vinyl siding to look and feel like real wood, down to the actual grain. With vinyl, you can eliminate the cost and maintenance of wood and choose a sustainable, durable, and affordable alternative. If you, your company, or your customers are dedicated to greener construction and building practices, then vinyl siding is for you.

Less Waste

From production to construction, vinyl siding produces less waste than other building materials, such as brick and cement. Vinyl siding products require minimal raw material and produce virtually no waste. They also require less water and energy to produce than other building materials.

Lower Impact

Vinyl siding also maintains a low environmental impact over its lifespan. The National Institute of Standards and Technology (NIST) developed Building for Environmental and Economic Sustainability (BEES) software to measure specific environmental concerns such as air pollution, acidification, and global warming potential in the environmental life cycle of products.

Throughout its life cycle, vinyl releases significantly fewer toxic chemicals into the environment than other siding materials and has a lower overall environmental impact.

Compared to vinyl siding, construction materials like fiber cement contribute 4x to global warming potential, 2x times to acidification, and over 3x to air pollution. Compared to other common sidings, vinyl performs amazingly well. According to the NIST, vinyl has a lower environmental impact than brick, and even rivals some wood siding.

Infographic courtesy Vinyl Siding Institute

Westlake Royal Building Products uses PVC resin as the backbone of Royal and Exterior Portfolio vinyl siding. This is derived from components in nature, such as common salt and natural gas, that make PVC weather-resistant, chemically stable, and lightweight.

Recyclable

While some argue that wood is a more eco-friendly siding option because it is biodegradable, vinyl siding lasts longer and is recyclable. Vinyl siding is recycled with post-consumer recycling, post-industrial recycling, and closed-loop recycling, meaning every part of its production and lifespan lends it to being easily reused.

Recycling reduces waste disposal and extraction of new materials while reducing landfill accumulation and incineration. Both lead to an increase in greenhouse gas emissions. Because of the nature of PVC, vinyl is a thermoplastic that can be ground up repeatedly, re-melted and formed into various new products even after the life expiration of the original product.

According to the Vinyl Siding Institute, 99% of scrap in manufacturing is recycled into other products rather than being sent to the landfill.

Longevity

The longevity of vinyl siding is part of what makes it so eco-friendly. Although recycling is an important component of sustainability, vinyl lasts such a long time it is unlikely to end up in the waste stream anytime soon. Many warranties on vinyl siding last for 40 years or more, meaning it doesn’t have to be ripped out and replaced very often.

Not only is vinyl long-lasting, but it’s low maintenance. Exterior siding that requires less care saves resources and reduces emissions and chemicals.

Thanks to innovative technology and sustainable practices, PVC vinyl siding is perfect for giving homeowners the aesthetic and performance they are looking for, while offering the peace of mind that our products were purpose-built to support a sustainable alternative and future.

Learn more about vinyl siding’s sustainability properties on the Vinyl Siding Institute’s website.