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Knob and Tube Replacement - Upgrade Your Home's Electrical System with Raincap Construction

Fortunately, electrical systems are much safer today than ever before. However, if you live in an older Seattle home, it may still contain knob and tube wiring. Since knob and tube wiring can be a serious safety hazard, it’s a good idea to replace it.

At Raincap Construction, we are experts in knob and tube replacements. You can count on us to upgrade your wiring to a safer, more modern option that meets modern building codes and gives you some much-needed peace of mind. Contact us today to get started.

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What is Knob and Tube Wiring?

Often installed in homes that were built between the 1880s to the 1930s, knob and tube wiring features white, ceramic “knobs” and black “tubes” that cover the copper wiring that delivers electricity throughout a home. Today, knob and tube wiring is typically found in attics, crawl spaces, and other hard-to-reach places in older homes. This system of wiring was phased out in the 1940s after better alternatives came along.

Issues with Knob and Tube Wiring

These days, knob and tube wiring is no longer considered safe and does not meet modern electrical safety codes. It was designed to carry a light electrical load and is overloaded easily in a modern home with multiple appliances often running at once. Since it lacks a ground wire, it can cause electrical shocks and poses a significant fire hazard. In addition, it can’t be used with 3-prong or modern appliances and isn’t covered by most homeowners insurance policies.

As the old wiring ages it becomes brittle and vulnerable to breakage and critters like mice and squirrels who chew on the knob and tube wiring and leave the bare copper exposed, making it ineffective and a fire hazard. Insulation contractors will not insulate spaces with active knob and tube wiring due to the fire hazard.

Increase Safety with Knob and Tube Replacement.

A knob and tube replacement is a simple yet very effective way to create a safer living space for your family and guests. Once our electricians pinpoint where the outdated wiring is installed in your older Seattle area home, they’ll design a plan that will likely include replacing it with a modern, safer alternative. To date, we’ve completed hundreds of knob and tube replacements, so you can rest assured your home’s wiring is in the very best hands.

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Signs You Need Your Home Re-wired

So, how do you know your Seattle area home is in need of a whole house wiring replacement? Here are some telltale signs:

  • Missing ground pin on outlets
  • Dimming or flickering lights
  • Constant circuit breaker tripping
  • Inconsistent power supply
  • Sparks
  • A burning smell
  • Visible wear and tear
  • Warm outlets and light switches

If you’re unsure, don’t hesitate to reach out to our team. We’ll be happy to assess your home and inform you whether you could benefit from modern wiring.

Benefits of a Knob and Tube Replacement

The most noteworthy benefits of a knob and tube replacement include:


Updating your wiring can reduce the risk of electric shock, fires, and other damages that often stem from short circuits and power surges. We can ensure your electrical system is safe and up-to-date.


If your home contains knob and tube wiring, you may notice that your lights flicker and appliances malfunction. A replacement can improve the functionality of your electrical system so you can avoid problems while using various devices.

Energy Efficiency

Rewiring an older Seattle home with a modern solution made of energy-efficient materials is a great way to increase the efficiency of your home. It will bring more power to the places it needs to go, potentially reducing your energy costs.

Home Value

Most homeowners prefer a home with up-to-date electrical systems. By replacing knob-and-tube wiring, you can increase your home value and attract more buyers should you decide to sell in the future.

Reduced Insurance Costs

Replacing unsafe wiring with a modern electrical wiring system could potentially lower the cost of your homeowner’s insurance.

In Need of a Knob and Tube Replacement in Seattle?

If safety is your top priority and you live in an older Seattle area home, a wiring upgrade may be in order. Contact Raincap Construction today at (206) 397-0016 or email us at for more information.