How to Shield a Building from the Effect of Electromagnetic Radiation?
How to protect from the effects of electrosmog is the most debated topic today. A quick internet search reveals many scientific studies, reports, and opinions. Half of these articles declare adverse health effects of electromagnetic radiation, while the other half consider them safe. Electrosmog is not good for human health. Direct contact with these radiations can adversely affect certain aspects of the body. Below are some shielding solutions to protect a building from electromagnetic radiation.
Using carbon-based materials
Carbon-based materials such as graphite, coke, carbon fiber, carbon nanotubes, graphene, fly ash, and soot have previously been used for electromagnetic pulse protection. Powdered graphite is a highly conductive filler. Tests have shown that the use of graphite powder in combination with a high-alumina cement paste enhances the effectiveness of electromagnetic shielding.
This effect increases with the percentage of graphite powder. With a graphite powder content of 30% by volume, a 3 mm thick sample showed a shield attenuation of 10 to 40 dB in the frequency range of 200 to 1600 MHz.
Several wallpapers are available on the market to act as electromagnetic shielding solutions. These protect the rooms from electromagnetic radiation where electroencephalography and magnetic resonance tomography procedures are performed. Another focus is the eavesdropping protection in embassy buildings and research facilities, which can also be achieved with this amazing wallpaper.
The radiation shielding properties of this non-woven wallpaper result from the addition of carbon fibers during the manufacturing process. Wallpaper converts high-frequency radiation into heat. Shield performance does not degrade over time, based purely on physical effects.
Conductive shield paint
An effective and easy-to-implement shielding solution for indoor and outdoor shielding is the application of specially formulated conductive paints to walls and ceilings. Conductive paint consists of carbon particles suspended in a high-quality acrylic binder. The paint contains no metallic components and is, therefore, highly corrosion-resistant.
The paint is applied with a roller like a traditional decorative dispersion wall paint (spraying is also possible). The black conductive paint layer can be applied with one or two coats of the decorative wall or facade paint. The paint is water resistant and has excellent adhesion to many common building and decorative materials such as cement, gypsum, masonry, and foam wall paints. Paint does not contain toxic solvents, plasticizers, or other toxic ingredients.
Solutions based on nickel powder
Research papers demonstrate the possible use of nickel in fabricating new composites in the form of various powders, films, and electrolytic coatings over substrates. Materials in which nickel plays an additive role (e.g., coatings) show increased absorption of electromagnetic waves in the microwave frequency range compared to nickel-free base materials.
Based on nickel powder deposited in a matrix (such as a polymer matrix), composite materials are excellent microwave absorbers due to nickel’s high magnetic permeability. Such materials absorb more radiation than most metals. The properties of the nickel powder produced by the carbonyl method are highly dependent on the nickel carbonate decomposition conditions and subsequent treatment.
In many cases, the easiest electromagnetic shielding solution is to install blinds made of specially manufactured shielding fabrics. The shielding fabric comprises polyester or cotton threads woven with fine silver/copper threads.
Metal threads are coated with varnish, so the surface is not conducive. The fabric has the look and feel of standard curtain fabric and is treated the same way to make drapes, but it is also treated with a “mosquito net” to protect the bed from electromagnetic radiation.
Architectural shielding fabrics and fleeces
Screening fabrics and gauzes are versatile and can be incorporated into building materials during construction, renovation work, or virtually any existing structure.
The sturdy fabric is used outdoors, is foldable, and resists frost and rot. It can be installed on walls, concrete structures, under roof tiles, etc. Lighter fabrics can be stapled to plasterboard, wooden frames, or glued to smooth concrete or other substrates.
These are a handful of shielding solutions. Note that the shield does not require an electrical ground to protect against radiofrequency electromagnetic radiation. Grounding walls treated with shielding paint is easy with the ground connection set. A ground connection set usually consists of a steel plate screwed into the shield wall and has a conductive fleece on the back to ensure a good connection to the paint or fabric surface.