A.C Vinyl Windows has been manufacturing high-quality thermal windows since 1986. We manufacture high-quality thermal windows primarily for renovations and private customized residential buildings. Our windows are built of lead-free UPVC extrusions from industry leader, REHAU Industries, and only the finest quality dual seal insulating glass and hardware. We want homeowners to replace their windows with our windows for a lifetime of performance. Our manufacturing facility in the Niagara Region has grown from 2,500 square feet to 22,000 square feet on 14 acres of prime industrial land. We attribute our growth to thousands of referrals and happy customers.