Does Aluminum Foil Block EMF: Works Maybe?

There are certain things on the internet that you shouldn’t believe because they’re fabricated. Things like putting your phone in the microwave are not going to charge it. What’s likely to happen is your phone or microwave blowing up. The internet is a vast place filled with information from all over the world. With the ability to go online, liars and trolls can fill that same space with false information. There has been a topic circulating online that says putting your device in some foil wrap will keep EMFs away from it.

So the question is, does wrapping aluminum foil around your electronics really protect it from EMF? The answer is yes because foil and aluminum mesh is known to repel EMF radiation. You can build a Faraday cage around anything that you want to keep EMF and it will block out all of the incoming and outgoing signals.

Does It Have To Be Foil?

Foil is an everyday item that can be found anywhere. Your parents probably keep some on a shelf in the kitchen or you’ve seen and used some aluminum foil before. Every brand of aluminum foil is at least 92 to 99% pure aluminum. The aluminum is then pressed down to thing sheets that are then sold to consumers. So nearly any type of foil is just as effective as the rest.

Is Aluminum Unique?

When you take a glance at the thirteenth element known to man, it’s not that special or rare. Even the Earth’s core is around 8% of pure aluminum. When you get to the outer shell where we are it becomes even more accessible, making it the most found metal known to man. There are only two elements that are more abundant than aluminum and that’s oxygen and silicon.

What makes aluminum different from other metals is that is it’s incredibly low weight, high strength, and corrosion resistance in comparison. Most Aluminum is also coated with oxide on the surface that prevents it from ever rusting. It’s a third of the weight of steel and yet just as durable. Plus we have the ability to recycle and reuse aluminum, making it very cheap to mass-produce and surprisingly versatile. Around 75% of all aluminum ever made is still in circulation.

You can’t find pure aluminum out in the world because it combines with other elements really easily. In layman’s terms, you could say that aluminum isn’t special after all. It can’t be unique if it binds with everything else around it.

Protecting Your Device With A Faraday Cage

Using a solid layer of either copper or aluminum, you can put anything like a person or device and make a Faraday Cage. Aluminum is the better option since copper corrodes more and is more expensive. Copper pipes and jewelry often have a turquoise tarnish that damages the metal in exchange for a better look.

All of the material that’s around what you want to protect will conduct external charges to distribute. It then cancels out any effect that the charge might have had while in the field. Faraday Cages have been documented to keep electromagnetic interference away from sensitive equipment such as a computer forensic test. They also use this method to keep waves inside of the cage.

Take an ordinary microwave for an example. The mesh patterned screen that you see your food through protects you from the microwaves. They work perfectly as an example of electromagnetic radiation.

Interestingly, there are bags that have been seen to be just as effective for protecting your devices as well. The Mission Darkness Duffel Bag is a personal favorite that can be found here and has been tested to not allow any type of wireless or otherwise penetrate the material.

Testing The Faraday Cage

We decided to take this chance to try it out for ourselves. We wrapped a smartphone with aluminum foil from the grocery store and had someone call it. You can imagine how surprised we were when the phone didn’t ring or vibrate. Everybody thought that it was way to simple to be working, but the results proved otherwise.

While the aluminum foil did block the waves from coming in contact with the cell phone, it doesn’t mean it will work with bigger things like homes or apartments. There’s no way to cover your whole house in an aluminum bubble, so we use something else to keep our equipment safe.

Is It Fool Proof?

Faraday cages work well but they aren’t perfect. While foil is better than mesh, it doesn’t block out all of the EMF or waves. It’s solid enough to disperse waves better but that’s about it. Using this method impairs the radio waves that a walkie-talkie or phone needs in order to work. Popular forms of EMF radiation that we know about come from radios as well as other things.

How long waves are can affect how well the shield works. How powerful the transmissions have also come into play. Not only that but how close it is to your shield can cause problems. RFIDs that are high-powered and have a high frequency can pass through your aluminum Faraday cage if it’s close enough.

Studies have been done to show that Faraday cages aren’t all that they seem to be. A solid or thick Faraday cage has been proven to be more effective than one that has thin foil or mesh.

How To Keep EMF Away From You

Prolonged exposure to EMF has been proven to cause cancer. If an EMF knocks out your power source then you won’t have any working technology or way to communicate with services. Being that vulnerable is dangerous and you should do everything in your power to protect it. Some advice for those who want to protect against EMF:

  • Wrap everything important in aluminum foil
  • Buy an aluminum trashcan
  • Get EMF clothing or make some

The materials used to create a house aren’t going to protect you. While there may be some aluminum in the frame of your house, it won’t be enough to defend against an attack.

What’s The Shielding Effect

You’ll have to sacrifice some things if you want to shield your house. Some cell phones won’t work inside due to the shield blocking the waves. Keeping EMFs and electric shocks away from you and your family seem more important than a phone call.

It also might have different effects on different wireless items. Such as your TV remote, which could have a shorter or longer range than normal. Be sure to test all of your electronics to see what a shield will do it for them.

Everything that’s powered by a battery will be fine to use. You can set alarm clocks and power things up as long as they use batteries. Light sockets will still work too so you can keep your lights on.

Faraday Cages with Wi-Fi

Routers are one of the things that use radio waves and are affected by Faraday cages. The shield will absorb the waves and make them weaker. It’s advised to switch to an Ethernet cable to a wired connection if this happens.


The effects of the Faraday cage may include heat around the house. The waves that the shield absorbs get converted into little bits of heat energy.

This can either be a good or bad thing depending on how you like your temperature in your house. You can save a little money and turn off your heater in the winter while the Faraday cage does all of the work, or turn on extra fans in the summer to negate it.

Final Thoughts

Is going through all of this worth it in the end? When it comes to keeping out EMF then it totally is. Everybody has a different lifestyle that abides by so each set up might be different. You can have an EMF proof basement to hide out in or an entire house free of EMFs if you’re willing to put in the work.

Just like how cleaning around your house every day makes it easier than cleaning it once a month, you’re going to want to make it easier on yourself when it comes to protecting against EMF. Starting with one section of your house at a time until your whole house is EMF proof is a great strategy.