# Knob-and-Tube Articles

> Articles on knob and tube wiring in Philadelphia houses: attic insulation, the city's electrical code, an illustrative rewiring sequence and records for a sale.

URL: https://phillyknobandtube.com/blog/

Shorter pieces on the moments when old wiring becomes a question in a Philadelphia house: an insulation project in the roof space, a code change, a sale with a settlement date, or the order in which a rewire actually unfolds. The guides cover each topic in depth; these articles follow one situation at a time.

## Latest posts

- Illustrative Walkthrough [An Illustrative Occupied-Home Rewiring Schedule: What a Typical Whole-Home Knob-and-Tube Job Looks Like](https://phillyknobandtube.com/blog/illustrative-old-house-rewiring-sequence/)An illustrative walkthrough, not a real job: a made-up two-story Philadelphia rowhouse with a household living in it, followed from the first assessment to the last inspection. October 26, 2026
- Dates and Deadlines [Organizing Rewiring Records for a Future Home Sale](https://phillyknobandtube.com/blog/organizing-rewire-records-for-a-home-sale/)A house sale has a few predictable moments when someone asks about the wiring: the listing, the buyer's inspection and the buyer's insurance. The paperwork from a knob-and-tube replacement answers them, if you can find it. October 26, 2026
- News [Philadelphia Electrical Code and Existing Knob-and-Tube Wiring](https://phillyknobandtube.com/blog/philadelphia-electrical-code-and-knob-and-tube/)Philadelphia's electrical code is built on the 2020 National Electrical Code, and its building codes moved to the 2021 International Codes beginning July 1, 2026. Here is what that does, and does not, mean for a house that still has knob-and-tube. October 26, 2026
- Seasonal [Preparing for Attic Insulation When Knob-and-Tube Wiring May Be Present](https://phillyknobandtube.com/blog/why-attic-insulation-exposes-legacy-wiring-questions/)Insulation projects tend to get booked when the weather turns, and that is often the moment old attic wiring stops being someone else's problem. Here is how to plan the order of work. October 26, 2026