Kolbe Windows Vs Marvin . We ended up going with the marvin infinity line (wood interior, fiberglass exterior). I just compared kolbe wood clad to marvin and felt the details on the marvins were much better than the kolbe windows. Window Nation Reviews Updated 2019 & 2020 Reviews and Prices from www.proreplacementwindows.com The company initially dealt with cedar and lumber back in 1912 but has since ventured into home renovations. Look for aama gold label. I am busy replacing some windows and have narrowed down my search to the kolbe latitude windows, which are vinyl and the marvin integrity all ultrex windows, which are fiberglass.