Lifetime Windows & Siding is a Denver-based, locally owned and operated company in business since 2009. Founded by business partners Peter Svedin and Jason Lewis, the company is now a leader in offering windows, siding, and roofing in the Denver Metro Area. Lifetime Windows & Siding is the #1 dealer of Infinity by Marvin Windows and Marvin is the leading brand of fiberglass windows in the world. All windows sold by Lifetime Windows & Siding are Energy Star rated, backed by a lifetime service and labor guarantee, and offer a transferable warranty to next homeowners. The company supports local businesses and American manufacturers, offers free quotes, and has a team of trained factory craftsmen and professional support staff.