Knob & Tube Rewire
Residential Knob & Tube Rewiring Specialists
If your home was built before 1950, it may still rely on Knob & Tube (K&T) wiring. While revolutionary at the turn of the century, this ungrounded system is now a primary concern for home safety, property insurance, and modern power needs. We specialize in the delicate process of deactivating these legacy systems and replacing them with safe, modern copper wiring.
Why Is Knob & Tube a Risk Today?
Knob & Tube wiring consists of single-insulated copper conductors run through porcelain “tubes” and supported by ceramic “knobs.” While the porcelain itself lasts forever, the system has several critical flaws in a modern home:
The Problem | The Danger | The Solution |
No Ground Wire | Increases risk of shock and damage to sensitive electronics. | Installation of 3-wire grounded circuits. |
Brittle Insulation | The cloth/rubber covering flakes off over time, leaving bare wires. | Full replacement with heat-resistant Romex. |
Heat & Insulation | K&T requires “free air” to stay cool; covering it with modern attic insulation is a fire hazard. | Deactivation before energy-efficiency upgrades. |
Insurance Refusal | Many providers will not insure or renew policies for homes with active K&T. | Professional certification of a full rewire. |
Our Specialized Rewiring Process
Rewiring a vintage home requires a “surgical” approach to protect your lath-and-plaster walls and historic architectural details.
- Non-Invasive Diagnostic: We map out exactly where the active K&T remains (often it is “spider-webbed” behind walls even if the panel looks modern).
- Strategic “Fishing” Techniques: Our experts use specialized tools to pull new wire through existing cavities, significantly reducing the need for large drywall or plaster cuts.
- Full Deactivation: We don’t just “cut and run.” We ensure all old wiring is safely disconnected from the power source and removed where accessible (attics/basements).
Whole-Home Grounding: Every outlet is upgraded to a modern 3-prong grounded receptacle, protecting your appliances and your family.
Benefits of a Full Professional Rewire
- Seamless Insurance Approval: We provide the documentation your insurance company needs to confirm the home is K&T-free.
- Modern Power Capacity: Your new system will easily handle high-draw appliances like microwaves, hair dryers, and air conditioners that often “tax” old K&T circuits.
- Increased Resale Value: Home inspectors red-flag K&T wiring immediately. A modern rewire is one of the best investments for a smooth home sale.
Peace of Mind: Sleep better knowing your home’s electrical system meets the 2025 National Electrical Code (NEC).
Our 4-Step "Historic Home" Approach
- System Audit: We identify which circuits are active K&T and which have been previously updated.
- Pathfinding: We plan the most efficient routes through your crawlspaces, attics, and walls to minimize disruption.
- The Rewire: We install a new, code-compliant system, room-by-room, ensuring you have power where you need it.
- Device Installation: We finish with modern switches, dimmers, and outlets that complement your home’s historic aesthetic.