Windows Home / Windows We look at windows in a different way and we understand that every customer is looking to realize a different and unique possibility. That’s why every Koltech window is custom crafted to meet your unique needs and add beauty, comfort and security to your home. Each Kohltech series of windows features outstanding craftsmanship, energy efficiency, innovation and value. We believe in offering more choice of window styles, glass, hardware and colors because choice means more freedom for you to realize your own unique possibilities. Tilt & Turn Our innovative tilt & turn windows offer unmatched versatility. Casement Opens out and hinged on the side.Our best performing windows against snow, wind and rain.