The Vinyl Siding Institute is a trade organization for vinyl siding manufacturers and contractors. Their goal is to promote high quality standards for both siding products and installation. They maintain a prestigious certification program for vinyl siding products and installers. Opal Enterprises has completed VSI training programs and testing to have obtained the certification as a vinyl siding installer.
Opal Enterprises is also a member of the Vinyl Siding Institute.
For more information about VSI visit: vinylsiding.org