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VSI Product Certification Program
More than 98 percent of vinyl siding manufactured in the United States each year – covering more than 800 products and more than 400 colors – is certified through the VSI Product Certification Program. Through twice-yearly, unannounced inspections of manufacturers and rigorous testing, the quality control agency ensures that certified products:
- Withstand the impacts of recommended installation procedures
- Lie straight on a flat wall and does not buckle under normal conditions
- Weather the effects of sunshine, rain and heavy winds of at least 110 mph
- Meet manufacturers’ advertised specifications for length, width, thickness and gloss
- Are available in a wide variety of attractive colors, with an independent process to certify colors for color retention.
VSI Certified Installer Program
The VSI Certified Installer Program recognizes a combination of work experience, successful completion of a training course, and demonstration of knowledge of vinyl siding installation techniques based on industry industry-accepted standards. Currently, more than 2,700 installers are certified by an independent, third-party administrator.
Official List of Certified Products and Colors
Vinyl and other polymeric siding, including insulated siding, are the only exterior claddings with product certification administered by an independent, accredited quality control agency that ensures products meet or exceed industry standards for performance. Hundreds of colors are also certified to meet or exceed ASTM standards for color retention, so you can be sure they will resist major color changes in a variety of climates. Currently more than 800 products and more than 400 colors are certified to meet or exceed international standards for quality and color retention.
Certified Vinyl Siding: Quality and Color You Can Count On
Learn more about the specific performance requirements in ASTM D3679 that vinyl siding must meet or exceed in order to be certified. Once a product is certified, it can achieve additional certification for color retention by meeting or exceeding ASTM D6864 (solid colors) or ASTM D7251 (multi-hued) and as verified by an independent, accredited quality and control agency, which reviews two-year, outdoor weathering data on each product color.