Defect Library · Roseville, MNKnob-and-Tube Wiring in Older Roseville-Area Homes
Knob-and-tube (K&T) is the pre-1950 wiring method using ceramic knobs to suspend conductors and ceramic tubes to pass through framing. There's no grounding conductor, and connections are made in open air.
What is Knob-and-Tube Wiring?
Knob-and-tube (K&T) is the pre-1950 wiring method using ceramic knobs to suspend conductors and ceramic tubes to pass through framing. There's no grounding conductor, and connections are made in open air.
What do we find on Roseville inspections?
Roseville proper is mostly post-1950, so true K&T is rare here — but Falcon Heights bungalows near Como Avenue and the State Fairgrounds still have it.
What should you do about it?
Re-wire affected circuits. Cost varies dramatically by access — $4,000 to $15,000+ for a typical 1920s bungalow.
How this connects to other Roseville defects
Era-defects rarely show up in isolation. A 1965 Roseville rambler that has one of these almost always has two or three more from the same construction window. Our defect library documents the full set we look for, and the inspection report cross-references findings so you can see the pattern.
Related defects in the same era window
Get this checked on your Roseville inspection
Call (651) 666-5602 or request an inspection quote. Knob-and-Tube Wiring is included in every standard home inspection we perform. Same-week digital report with photos and prioritized repair recommendations.
Ready for a Roseville Home Inspection?
Same-week reports. Thermal imaging included. Era-specific findings for 1955–1975 ramblers, lakefront walkouts, and new-construction townhomes.