Windows are one of the most important character defining features on a historic building. For example, sliding windows, with their sashes on staggered planes, side by side, present a significantly different face than a pair of double hung windows, while providing nearly the same amount of light and ventilation. Vinyl windows, with a second frame installed within the existing window frame significantly reduces the amount of glass in the window.
It is preferred that existing damaged or deteriorated window frames and sash be repaired rather than replaced. Under no circumstances will solid vinyl or vinyl clad windows be approved for replacement windows. Metal clad windows may be approved for basement egress window applications only.
When repairing or, if necessary, replacing window frames or sash, work must comply with these requirements:
If replacing the entire window becomes necessary, the following conditions shall be applied:
See illustration #8 for window parts.
Lead abatement: Call the coordinator for more information
If storm windows are to be installed, they must be visually compatible with the historic windows over which they will be installed. The following requirements should be considered when planning storms and screens.