Question 1

What is knob-and-tube wiring and why is it a concern in Florida real estate?

Accepted Answer

Knob-and-tube (K&T) wiring is an early electrical wiring method used in homes built from the 1880s through the 1940s. It uses ceramic knobs to support wires along framing members and ceramic tubes to protect wires passing through joists and studs. In Florida real estate, K&T wiring is a significant concern because: most insurance companies will not insure a home with active K&T wiring (creating a barrier to sale and financing), the wiring was not designed for modern electrical loads (air conditioning, kitchen appliances, computers), it lacks a ground wire (increasing the risk of electrical shock), it degrades over time (insulation becomes brittle and falls off, exposing live wires), and it can be a fire hazard when covered by insulation (the wiring was designed to dissipate heat in open air).

Question 2

How does knob-and-tube wiring affect Florida home sales?

Accepted Answer

Impact on sales: most Florida homeowners insurance companies (Citizens, Heritage, Universal, etc.) will not issue a policy on a home with active K&T wiring. Without insurance, most buyers cannot obtain a mortgage (lenders require insurance as a loan condition). This means: the seller may need to rewire the home before selling (cost: $8,000-0,000+ for a full rewire), the buyer may negotiate a price reduction to cover the rewiring cost, the seller may need to provide a rewiring credit at closing, or the buyer may need to find a specialty insurer willing to insure K&T wiring at a higher premium. A four-point inspection (required by many Florida insurers for homes over 25 years old) will identify K&T wiring.

Question 3

Can knob-and-tube wiring be partially replaced in Florida?

Accepted Answer

Partial replacement is possible but may not solve insurance issues: some electricians will replace the most accessible K&T wiring (in the attic and crawl space) while leaving wiring inside walls. This reduces the risk but may not satisfy insurance companies, which often require complete removal of all K&T wiring before issuing a policy. A licensed Florida electrician should evaluate the home to determine: the extent of the K&T wiring, whether any K&T circuits have been modified or improperly connected to modern wiring, whether the K&T wiring is covered by insulation (a fire hazard), and the cost of partial vs. complete rewiring. The electrician should provide a written report that can be submitted to the insurance company.

Knob and Tube Wiring

Knob-and-Tube Wiring in Florida Real Estate

Why It’s a Concern

Impact on Home Sales

Replacement Options

Related Terms

Barnes Walker Real Estate

Ready to Get Started?