About Us

In 1993, Bill Hepburn began investigating and building his own historic replacement wood windows as a unique solution for the drafty windows in his 100-year old Victorian farmhouse. Seeking a traditional, historic window with contemporary performance, he came up with the Magnum High Performance Historic Wood Windows. 

As he worked, he developed the WindowLogic Weatherstripping System, a kit that eliminates air infiltration and protects the most vulnerable elements of the historic wood window. The jamb liners he developed work exclusively with this type of window, whether original or reproduction. Either version will benefit from the installation of this kit.