We are starting a window replacement job for a Northfield client on an older home. The home has traditional six lites over one lite windows. The client wanted to retain the same configuration for the new windows. We selected Marvin replacement windows for the project. They offer a simulated six lite pattern that includes exterior and interior muntins with spacers between the glass. This gives an excellent reproduction of the original windows. We remove the sashes, insulate the perimeter of the window and install the new Marvin units. It makes a wonderful, tight, new window upgrade for this home.