Cloth-Insulated Wiring: What Twin Cities Homeowners Should Know Before They Renovate
Open a wall in a pre-1960s Twin Cities home and you’ll often find wiring wrapped in woven cloth insulation instead of the plastic (PVC) sheathing used today. It’s not automatically dangerous, but it changes how a renovation needs to be planned.
Why it matters more during a remodel
Cloth insulation dries out and becomes brittle with age, especially anywhere it’s been exposed to heat — near light fixtures or in uninsulated attics. It’s more prone to cracking when disturbed, which is exactly what happens during a kitchen or bathroom remodel when walls get opened up.
The renovation decision point
Once a wall is open for a remodel, it’s the cheapest point in the project’s life to replace old cloth wiring with modern cable — the labor to access it is already priced into the job. Waiting means paying to open that same wall again later.
It’s not automatically a knob-and-tube situation
Cloth-insulated wiring can be either older knob-and-tube style or modern-format Romex with a cloth outer jacket (common through the 1950s-60s) — the fix depends on which you actually have, which is worth confirming before assuming the worst.
Planning a remodel in an older home?
Three Rivers Electric evaluates existing wiring before your project starts so there are no surprises once the walls are open. QMerit-certified, licensed (EA761814), veteran-owned, 5.0★. Get a quote or call 651-418-1476.
