Why choose certified siding?
Selecting certified vinyl siding is more important than any brand, style, or color you may choose. Certification authenticates that the siding is of high quality, has passed rigorous testing and will deliver on the manufacturer’s claims. However, just choosing certified siding isn’t enough: Your installer should also be certified. A certified installer will properly install your vinyl siding to make sure it looks great, performs as promised and meets warranty requirements.
Who certifies vinyl siding?
The Vinyl Siding Institute (VSI) is an organization responsible for setting the bar for vinyl siding quality through installation certification programs and product testing. They create the programs to certify the consistency and quality of vinyl and polypropylene siding. These programs are verified by an independent third party quality control agency, Intertek.
Intertek tests against the industry’s quality standards (ASTM D3679 and ASTM D7254) twice a year, conducts unannounced manufacturing plan inspections, and reports their findings. In addition to the independent quality control verifications, VSI sponsors third-party verifications for vinyl siding color retention – further ensuring the integrity of product claims.