
Knob and Tube Wiring: Dangers, Insurance Issues, and Replacement Options
Knob and tube wiring in older homes creates fire hazards and insurance complications. Learn how to identify this...

Replace outdated knob-and-tube wiring to eliminate fire hazards and meet modern standards. Trusted by Arlington Heights homeowners for over 30 years. Licensed, insured electricians serving Arlington County.
Arlington Heights homeowners trust AJ Long Electric for professional knob & tube replacement services. With over 30 years serving Arlington County, we understand the unique electrical needs of bungalow, colonial, ranch homes throughout this neighborhood.
Many Arlington Heights homes experience pre-war bungalows with knob-and-tube and cloth-insulated wiring, which can affect knob & tube replacement projects. Our licensed electricians are familiar with local construction styles and know how to address common challenges efficiently.
Knob-and-tube (K&T) wiring was the standard electrical wiring method used in homes built from the 1880s through the 1940s. While it was adequate for the minimal electrical demands of that era, knob-and-tube wiring is completely inadequate and potentially dangerous for modern electrical loads. The insulation on K&T wiring is typically rubber or cloth that becomes brittle and crumbles after decades, exposing bare conductors. The system lacks a ground wire, cannot support modern three-prong outlets, and was never designed for the amperage demands of today's appliances. Most critically, K&T wiring becomes a serious fire hazard when it contacts insulation -- a common problem in homes where blown-in or batt insulation has been added over the wiring. AJ Long Electric provides professional knob-and-tube wiring replacement throughout Northern Virginia, particularly in older homes in Arlington, Alexandria, Falls Church, and Fairfax City. Our electricians systematically replace K&T wiring with modern Romex copper wiring, adding proper grounding, AFCI protection, and sufficient circuits for modern electrical demands. We work carefully through attics, walls, and basements to remove old wiring with minimal disruption to your home's plaster walls and historic character. Every project includes full permitting, inspection, and detailed documentation for your insurance company.
Every knob & tube replacement project we complete in Arlington Heights receives the same attention to detail and commitment to safety that has earned us over 1,400 five-star reviews. We handle all Arlington County permits and inspections, ensuring your project meets current electrical codes.
Contact us today for a free estimate on knob & tube replacement for your Arlington Heights home. Our electricians will assess your specific needs and provide a detailed quote with no hidden fees or surprises.
Eliminate the fire hazard of degraded insulation, ungrounded circuits, and overloaded K&T wiring.
Most insurance companies refuse coverage or charge extreme premiums for homes with active knob-and-tube wiring.
Replace inadequate K&T circuits with properly sized wiring that supports modern appliances and devices.
Add the equipment ground wire that K&T wiring lacks, enabling safe use of three-prong outlets.
Once K&T is removed, you can safely add wall and attic insulation for energy efficiency without fire risk.
We trace all K&T wiring throughout the home, identifying active circuits, junction points, and areas of concern.
We design the new wiring layout with modern circuits, grounding, and AFCI protection to replace K&T circuits.
You receive an itemized quote covering all rewiring, panel work, permits, and wall restoration.
We obtain all required permits from your jurisdiction and schedule inspections.
Working area by area, we replace K&T circuits with modern Romex copper wiring, adding grounding and AFCI protection.
Get Your Free Estimate
Contact us for a detailed, no-obligation quote for your Arlington Heights property.
Get a free estimate for knob & tube replacement in Arlington Heights.
Or call (703) 997-0026
FAQs
Knob & Tube Replacement costs in Arlington Heights vary based on several factors including amount of active k&t wiring to replace, home size and number of circuits, accessibility through attic, basement, and wall cavities. For bungalow homes in Arlington Heights, we provide free, detailed estimates so you know exactly what to expect. Contact us at (703) 997-0026 for a no-obligation quote specific to your Arlington Heights property.
Most knob & tube replacement projects in Arlington County require electrical permits to ensure code compliance and safety. AJ Long Electric handles all permit applications and inspections as part of our service. We are fully familiar with Arlington County's permitting requirements and ensure your project meets all Virginia electrical codes.
For bungalow and colonial homes common in Arlington Heights, knob & tube replacement typically takes varies based on scope. Factors like home age (around 1942) and accessibility can affect timeline. We always complete projects efficiently while maintaining our high quality standards.
Arlington Heights homes, many built around 1942, often present unique challenges: Pre-war bungalows with knob-and-tube and cloth-insulated wiring. Duplex properties requiring separate metering and panel upgrades. Our electricians have extensive experience with bungalow construction and know how to address these issues efficiently during knob & tube replacement projects.
With over 30 years serving Arlington County, we understand Arlington Heights's unique housing stock and electrical systems. We are licensed and insured in Virginia, maintain a 4.9-star rating with 1,400+ reviews, and provide upfront pricing with no hidden fees. Our electricians know the bungalow, colonial, ranch, duplex homes in Arlington Heights and deliver reliable, code-compliant knob & tube replacement services.
Yes, we offer same-day and next-day scheduling for knob & tube replacement projects in Arlington Heights when available. For urgent electrical needs, our technicians can often arrive within 2-4 hours. We maintain service vehicles throughout Arlington County to ensure rapid response to Arlington Heights and surrounding neighborhoods.
All knob & tube replacement work in Arlington Heights is backed by our workmanship warranty and our satisfaction guarantee. We stand behind every project and return at no charge if any issues arise. Additionally, equipment and materials carry manufacturer warranties. We provide complete documentation for your records.
Explore our complete range of electrical services for Arlington Heights homeowners.
Upgrade your home's electrical capacity with safe, modern panel installations.
Stay powered through outages with a safe portable-generator hookup or a silent battery power station.
Replace faulty, tripping, or outdated circuit breakers for reliable power distribution.
Install dedicated circuits for high-draw appliances, workshops, and home offices.
We also provide knob & tube replacement in these nearby areas.
Expert electrical guides to help you make informed decisions.
A comprehensive room-by-room electrical safety checklist every homeowner should review regularly to identify potential hazards.
Navigate the electrical permit process in Northern Virginia with confidence. Learn requirements for Fairfax County, Arlington, Alexandria, and surrounding areas.
Expert Resources
Guides our licensed electricians point knob & tube replacement customers to most often.

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Contact us today for a free estimate. Our licensed electricians are ready to help with your knob & tube replacement project.
AJ Long Electric provides professional knob & tube replacement services in Arlington Heights, Virginia. We serve bungalow, colonial, ranch, duplex homes throughout Arlington County. ZIP codes: 22204. Call (703) 997-0026 for knob & tube replacement near Barcroft Park and Columbia Pike.