Faraday Cage, how to make it.
- AnneAster
- Apr 3
- 4 min read
Here is an example of a good Faraday cage model, though imperfect like anything else! But when well-made, it benefits many people greatly.
Please note these details:
Transparent silver mesh fabric: it breathes well but is not as effective as denser, more opaque fabrics.
There is an anti-wave mat. It would have been wiser to choose a larger one to ensure the cage is fully sealed.
There is a gap between the bed and the fabric. It's fine on one side, but it would have been better if the gap was the same on all sides. The reasons: in cases where the grounding is inadequate and the fabric is exposed to certain low frequencies, the distance is your friend. Also, the distance prevents the blankets from pushing the fabric of the cage.
The door overlaps. Don't make it narrower, but it’s good to make it a bit wider. In the photo, you can see at the bottom that the door isn't perfectly sealed, which poses an issue for the seal that should be avoided.
The cage is suspended from the ceiling, and the fabric takes on a banana shape between each hook. This should be avoided because it causes problems with the doors, even though the photo doesn’t clearly show it. The top of the cage should be straight to allow for a good door closure.
The structures sold on Aliexpress to hold up the cage are not recommended.
The length of the fabric should be about 20 cm longer than the height. This is important for a proper closure at the bottom and to be able to place objects on top to keep the fabric in place in case a window is open and wind blows into the fabric.
It's better to have a nightstand inside the cage rather than outside, which is much more convenient.
Beware of cats! Keep extra fabric for repairs in case holes are made by cat claws. Your cage will look less nice with repair patches, so focus on your cat instead of looking at the patches. Your cat is probably more pleasant to look at than the patches.
If you are chemically sensitive, buy a sample of the fabric BEFORE purchasing a Faraday cage to check if the smell is tolerable. The smell is faint, but it is present. You can compare the silver-plated nylon with Adamantan 003. The silver-plated nylon allows for a more effective Faraday cage.
There are ready-made Faraday cages available, but in most cases, it’s better to buy the best fabric and make your own or have someone make a custom cage. This is certainly a better choice unless you choose a ready-made cage for a child’s bed. Ready-made cages are too small to offer space around the bed, as you can see in the photo. If you get a King-size for a Queen-size, you’ll have space on the sides, but the fabric will be too close to your head and feet, unless you are short and sleep in the middle of the bed.
Avoid spring mattresses, metal bed frames, metal nightstands, and wall-mounted lamps unless you have a shielded and tested lamp.
Get a device that measures body voltage and measure yourself inside and outside the cage. The goal is to have the lowest numbers. You can compare your readings depending on whether the electricity is off or if certain things are unplugged.
The Safe and Sound Pro2 device is the most recommended for most situations. You’ll need to measure the waves in your room before ordering the fabric and make sure all wireless devices are turned off. If the readings in your room are over 30,000 µW/m², the mesh fabric will probably not be sufficient. You will likely need to make a cage within a cage or change to a more effective fabric. It’s important to check that the cage is fully sealed when doing tests. Then make sure you don't have an emitter on you.
A device to measure electric and magnetic fields will be helpful to verify if the levels are safe and if the Faraday cage is working well. Test your grounding. However, 3-in-1 devices that measure RF microwaves are not good for measuring microwaves. You’ll still need the Safe and Sound Pro2.
If you need lighting, consider using battery-operated lamps.
A well-made Faraday cage blocks RF microwaves and electric fields if properly grounded, but it won’t be effective against magnetic fields. Often, it’s best to turn off the electricity in the room at night for sleeping. It’s up to you to decide if you can do that.
Don’t buy models of cages that touch the bed.
Know that if you choose fabric that is a cotton and metal blend, you'll have less air and a lower shielding performance. Cotton has no shielding power; it only provides aesthetics. Keep in mind that if aesthetics are a priority for you, your room would be prettier without a Faraday cage. However, if you have a truly effective one, you might sleep better and improve the aesthetics of your skin. Your body’s health and well-being should come before furniture, right?

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