I’m buying a house in an older neighborhood to set up as a rental unit. The house has the older style knob and tube wiring, which is visible in the attic. I’d like to add insulation to the attic to ...

Knob-and-tube wiring can be found in homes from the early 1930's and older. It gets its name from the cloth wrapped hot and neutral wires that travel separately and use white porcelain knobs and tubes ...

Q We purchased our home in July 2005. The house is about 120 years old and in great shape, but there’s a ton of knob-and-tube wiring. Someone mentioned recently that homes must have most or all of it ...