I recently remodeled my kitchen in a house built in the 1930s, and while working on it, I noticed my attic had hardly any insulation left. The challenge is that part of my home still uses knob and tube wiring, and I got three different contractors to come out and quote me on blowing in cellulose insulation. They all assured me that insulating over the knob and tube would be fine since it's in good condition. However, after their visit, I stumbled upon an article that warned against this practice, suggesting I should either remove the insulation or rewire my home as soon as possible. Has anyone experienced something similar or have any advice? Thank you!
2 Answers
I feel you! Leaving knob and tube wiring in place—especially insulating over it—is sketchy. Two wrongs don’t make a right, you know? I really think rewiring is the best route. Just unsure if you should do it immediately or if you can hold off for a month or two. The wiring sounds fine, but insurance could become a headache if anything happens.
From what I've learned, insulating around knob and tube wiring isn't advisable. It can lead to overheating issues with the wires. If the knob and tube system is in decent shape and has good airflow, it might not be a huge risk, but it's definitely better to err on the side of caution. Just keep an eye on it!

Yeah, I get where you're coming from. I had a similar wiring issue that escalated quickly, and I had to replace it for insurance reasons. Talk to your insurance agent—knob and tube might cause problems down the line. Better to handle it sooner rather than later!