Old historical features that come with an older home may be appealing to some home buyers. The stained glass and original high quality materials are what attracts people to homes that are 100+ Years old. Consequently an additional feature that may come along is the presence of knob and tube wiring. Does it really matter if knob and tube wiring is present? Knob and tube setup WHAT IS KNOB AND TUBE WIRING? Electrical service to residential American homes began in the mid 1890's