This turn of the Century brick office building called the Medical Arts Building was being renovated for office space. The historic nature of the structure required wood window conservation rather than replacement. In this instance, the project specification called for removal of the interior and exterior finish. After the failed finish was removed, we concentrated our efforts on the conservation, repair and reinstallation of the original windows. Due to modifications in the floor plan, several windows were eliminated at various times. The scope of the work called for these units to be replaced. Using a surviving sash as a model, we had replacement plank frame sash fabricated to match the originial window units.