The VSI Product Certification Program is an independent, third-party certification program with an ISO/IEC 17065 accredited certification body in place.
Products undergo a series of rigorous tests and unannounced inspections by an independent, accredited quality agency. In addition, quality control procedures at each plant facility are continually reviewed for accuracy to ensure consistent production of certified profiles.
Certified vinyl siding is evaluated to ensure it complies with the ASTM D3679 product standard for:
Weatherability, wind load, and impact resistance
Expansion and shrinkage
Surface distortion
Length, width, and thickness
Rate of burn
Lead
Certified insulated vinyl siding is evaluated to ensure it complies with the ASTM D7793 product standard for:
Weatherability, wind load, and impact resistance
Expansion and shrinkage
Thermal distortion
Length, width, and thickness
Rate of burn
Lead
Surface flame spread
Compatibility of adhesives
Thermal insulation value
Certified polypropylene siding is evaluated to ensure it complies with the ASTM D7254 product standard for:
Weatherability, wind load, and impact resistance
Surface flame spread
Color
Film adhesion
Certified products are authorized to utilize the Program’s certification mark. The mark represents that a manufacturer is producing a product that is a faithful representation of the tested and certified product in design, construction and fabrication.
The newest, best and most relevant information on vinyl siding products and performance. See our top picks below, or filter by type to find the resources you need now.
Brochure
Certified Insulated Siding — Quality and Comfort You Can Count On
Homes clad with certified insulated siding are assured that its continuous insulation will help prevent heat from escaping in winter and entering in summer through the exterior walls’ framing studs.
Like vinyl siding, polypropylene is another polymeric siding with its own unique quality standard and performance requirements. Learn more about how it’s certified with independent, third-party verification.