Knob-and-tube wiring is common in older Pittsburgh homes. Its age alone does not determine whether every circuit must be replaced, but its condition, previous alterations, loading, insulation, and the way the home is used all matter. JJM Electric evaluates accessible knob-and-tube wiring, explains the concerns that apply to the specific home, and develops a practical replacement or repair plan.

“John completed a knob and tube rewire for us and we couldn’t be more grateful for his hard work and communication! His quote was fair, he responds immediately and answers all questions thoroughly…he even made suggestions along the way on many things that we as new home owners wouldn’t have thought of.

I’d strongly recommend him for your electrical needs!”

— Amanda Willard

JJM Electric provides knob-and-tube wiring evaluations, targeted circuit replacement, partial rewiring, and whole-home rewiring throughout Pittsburgh and the North Hills.

We trace the existing system, identify later alterations, evaluate accessible connections and insulation, and explain what can remain, what should be replaced, and what work makes sense alongside renovations or other electrical upgrades.

• Evaluating accessible knob-and-tube wiring

• Tracing circuits and identifying later alterations

• Replacing damaged or improperly extended wiring

• Partial rewiring for kitchens, bathrooms, basements, and renovations

• Whole-home knob-and-tube replacement

• Adding grounded receptacle and lighting circuits

• Installing dedicated appliance circuits

• AFCI and GFCI protection where required

• Grounding and bonding improvements

• Panel and service coordination when needed

• Permit and inspection coordination where required

An evaluation is especially worthwhile when knob-and-tube wiring has been covered by insulation, extended with incompatible wiring methods, modified with open splices, damaged, overloaded, or connected to modern appliances and equipment it was not designed to serve.

It should also be reviewed before a major renovation, when adding insulation, after a home inspection raises concerns, or when you notice flickering, tripping, heat, discoloration, buzzing, or burning odors. These conditions do not automatically mean every circuit requires replacement, but they should be investigated.

Knob-and-tube was a standard wiring method when many Pittsburgh-area houses were built. Homes may now contain a combination of original knob-and-tube, later cable, newer circuits, and decades of repairs or additions.

The important questions are not simply whether knob-and-tube exists, but where it remains, what it serves, how it has been altered, whether insulation surrounds it, and whether the system safely supports the home’s present electrical use.

A typical project may include:

1. Discussing the home, concerns, and renovation plans

2. Reviewing the panel, devices, and accessible wiring

3. Tracing knob-and-tube circuits and later additions

4. Identifying priority repairs and replacement areas

5. Determining whether targeted, partial, or whole-home rewiring is appropriate

6. Discussing access through finished walls and ceilings

7. Providing a clear written estimate

8. Coordinating permits and inspections where required

9. Installing, testing, and labeling the new wiring

The scope is based on the home’s actual system—not a blanket assumption based on age.

Partial replacement can be practical when knob-and-tube is limited to specific rooms or circuits, newer wiring already serves much of the home, or a renovation creates access to a defined area.

Whole-home replacement may make more sense when knob-and-tube is widespread, heavily altered, surrounded by insulation, serving modern loads, or difficult to separate from unsafe additions. We explain the tradeoffs so the scope fits both the condition of the system and the homeowner’s plans.

Renovations and insulation projects can change the practical approach to existing knob-and-tube wiring. Open walls and ceilings may make replacement less disruptive, while adding insulation around active knob-and-tube can create concerns that should be addressed before the insulation work proceeds.

When circuits are replaced or extended, current protection, grounding, box, device, and permit requirements may apply. We coordinate the electrical scope with the planned work and explain what must be updated.

Knob-and-tube can create a lot of uncertainty for homeowners, inspectors, buyers, and renovation contractors. We explain where it remains, what condition is visible, which alterations matter, and why a targeted or broader replacement is being recommended.

Our goal is a clear plan—not pressure based solely on the age of the home.

Have knob-and-tube wiring, an older home inspection report, an upcoming renovation, or concerns about previous alterations?

Contact JJM Electric LLC to discuss the home and the work you are considering. We will review the accessible system, explain the likely next step, and provide an estimate based on the condition and scope.

JJM Electric LLC is an owner-operated residential electrical contractor serving Pittsburgh-area homeowners. John has worked in the electrical trade since 2013 and especially enjoys solving the unusual wiring problems found in older homes.

Our approach emphasizes careful evaluation, honest recommendations, clear communication, respect for your home, code-conscious work, clean installations, and practical planning around plaster walls, renovations, and occupied spaces.

JJM Electric provides knob-and-tube evaluations, partial rewiring, and whole-home replacement throughout Pittsburgh and the North Hills, including West View, Ross Township, McCandless, Wexford, Franklin Park, Hampton, Fox Chapel, and surrounding communities.