4 ms·

Industrial radiant barrier with aluminum on one side and white vinyl for aesthetics on the other side is about $0.25/sq.ft. in the US. Available perforated or

Industrial radiant barrier with aluminum on one side and white vinyl for aesthetics on the other side is about $0.25/sq.ft. in the US. Available perforated or impermeable vapor barrier. When grounded, it can be used to shield walls from external surveillance of human activity. Doors and windows require more effort. Intro to shielding: https://www.eiwellspring.org/shielding.html https://www.eiwellspring.org/shielding.html DIY faraday cage: https://mpkb.org/home/special/emf/whitezones/faradaycage https://mpkb.org/home/special/emf/whitezones/faradaycage

PaulHoule 4y ago
They put in some insulation between my kitchen and my wood shed which has a metal foil layer on it. WiFi waves are effectively blocked on it and if I want to use WiFi in the wood in the summer I plug in a Ubiquiti AP and a powerline network adapter there.
teruakohatu 4y ago
I think our building code in New Zealand no longer allow foil insulation on new buildings for electrical safety reasons.
- samstave 4y ago
  The safety of the Electronic Surveillance State is threatened by foil insulation, thus we will ban it :-)
- transpute 4y ago
  Foil insulation should be grounded, both for electrical safety and EMF shielding performance.
  - teruakohatu 4y ago
    It should, but the problem is when 20 years later the grounding is detached (for example new owners are not aware it is even installed). That is why it is banned here and installing it on a new building can carry a six figure fine.
- antod 4y ago
  I personally knew one of the reasons for that :(
amluto 4y ago
As a word of advice, if want a Faraday cage because you want to to protect yourself from electromagnetic hypersensitivity, then by all means, knock yourself out following those directions. Preferably not literally, because, as noted in the links, lack of airflow will hurt you rather more reliably than EMI. But if you want to actually keep EM radiation in or out in a measurable way (and WiFi sensing is the epitome of measurability), then I recommend learning about shielding from a professional. Professionals, by and large, don’t believe the electromagnetic hypersensitivity exists, at least not in the form that those webpages discuss.
- transpute 4y ago
  What does EMF shielding (for security or any other reason) have to do with airflow? Radiant barrier is perforated with small holes for airflow, which don't affect shielding performance at lower frequencies like 2.4Ghz/5Ghz, which can pass through walls. mmWave Wi-Fi radar (e.g. 60Ghz 802.11ad) doesn't propagate well through walls. There is conductive mesh for open windows and some existing window insect screens are made of conductive material that effectively blocks EMF. Indoor air quality can be monitored, with or without EMF shielding.
  - amluto 4y ago
    The mpkb.org link discusses rather small faraday cages like this: https://www.marshallprotocol.com/images/Building_a_DIY_Faraday-Cage.pdf https://www.marshallprotocol.com/images/Building_a_DIY_Farad... Look at the awesome picture on the very top left. That’s a tent made out of Mylar or a similar material. You can’t monitor the air quality inside with modern technology because that would pollute the interior EM environment, thereby defeating the purpose [0]. I like fresh air in my room, TYVM. [0] Of course you could use a fan outside to move some air through a mesh and sample it, and you should if you’re going to live in this thing, because IAQ is important.
    - deleted 4y ago
      [deleted]

PaulHoule 4y ago

They put in some insulation between my kitchen and my wood shed which has a metal foil layer on it. WiFi waves are effectively blocked on it and if I want to use WiFi in the wood in the summer I plug in a Ubiquiti AP and a powerline network adapter there.

teruakohatu 4y ago

I think our building code in New Zealand no longer allow foil insulation on new buildings for electrical safety reasons.

samstave 4y ago
The safety of the Electronic Surveillance State is threatened by foil insulation, thus we will ban it :-)
transpute 4y ago
Foil insulation should be grounded, both for electrical safety and EMF shielding performance.
- teruakohatu 4y ago
  It should, but the problem is when 20 years later the grounding is detached (for example new owners are not aware it is even installed). That is why it is banned here and installing it on a new building can carry a six figure fine.
antod 4y ago
I personally knew one of the reasons for that :(

amluto 4y ago

As a word of advice, if want a Faraday cage because you want to to protect yourself from electromagnetic hypersensitivity, then by all means, knock yourself out following those directions. Preferably not literally, because, as noted in the links, lack of airflow will hurt you rather more reliably than EMI. But if you want to actually keep EM radiation in or out in a measurable way (and WiFi sensing is the epitome of measurability), then I recommend learning about shielding from a professional. Professionals, by and large, don’t believe the electromagnetic hypersensitivity exists, at least not in the form that those webpages discuss.

transpute 4y ago
What does EMF shielding (for security or any other reason) have to do with airflow? Radiant barrier is perforated with small holes for airflow, which don't affect shielding performance at lower frequencies like 2.4Ghz/5Ghz, which can pass through walls. mmWave Wi-Fi radar (e.g. 60Ghz 802.11ad) doesn't propagate well through walls. There is conductive mesh for open windows and some existing window insect screens are made of conductive material that effectively blocks EMF. Indoor air quality can be monitored, with or without EMF shielding.
- amluto 4y ago
  The mpkb.org link discusses rather small faraday cages like this: https://www.marshallprotocol.com/images/Building_a_DIY_Faraday-Cage.pdf https://www.marshallprotocol.com/images/Building_a_DIY_Farad... Look at the awesome picture on the very top left. That’s a tent made out of Mylar or a similar material. You can’t monitor the air quality inside with modern technology because that would pollute the interior EM environment, thereby defeating the purpose [0]. I like fresh air in my room, TYVM. [0] Of course you could use a fan outside to move some air through a mesh and sample it, and you should if you’re going to live in this thing, because IAQ is important.
  - deleted 4y ago
    [deleted]