Metallised shielding fabric (silver or copper on polyester)
Curtains, bed canopies and clothing woven with silver or copper, typically quoted at 30–50 dB across the cellular and Wi-Fi bands — enough to remove 99.9% of incident power density when installed without gaps.
fabricradiofrequency
Last verified 12 August 2026.
Also searched as: EMF fabric, shielding curtain, bed canopy, faraday fabric
- Form
- fabric
- Targets
- radiofrequency
- Grounding required
- No
- Datasheet attenuation
- 30–50 dBroughly 900 MHz – 6 GHz, datasheet values for flat samplessources: sbm-2024
Failure modes
- Any unclosed gap dominates the result: a canopy left open at one edge can measure barely better than no canopy
- Silver coatings degrade with washing, abrasion and perspiration; conductivity loss is invisible
- Reflective by design — a partially enclosed space can raise levels inside it if a transmitter is inside the enclosure
- Grounding a canopy does nothing for RF and can create a low-frequency electric-field problem if done incorrectly
Related records
- Shielding attenuation
Decibels of field reduction provided by a material. Every 10 dB is a factor of 10 in power density: 30 dB removes 99.9%, 10 dB removes 90%.
Quantities & units
- Shielding verification
How to prove a shielding measure worked: identical instrument, position and source conditions before and after, reported in dB as well as in absolute units.
Measurement protocols
Sources
- sbm-2024 Building Biology Evaluation Guidelines for Sleeping Areas (SBM-2024) — Institut für Baubiologie + Nachhaltigkeit (IBN), 2024. ngo, link checked 2026-08-12.
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