Venting of Protective Covering SystemThe venting system is necessary to reduce heat build-up and reduce the potential for condensation, which preserves the stained glass windows.
Vitreous PaintA mixture of ground glass and metallic oxides used to paint on glass.
West EndThe west or entrance end of the church is the people's area. Usually the large west wall has the rose window. It is not necessarily compass west.
White GlassTerm often misused for clear glass.
Window GlassClear glass.
WispyCathedral glass containing white cloud-like steaks.
Z-SectionA Z-shaped metal extrusion found at the perimeter of the sash.