RF-attenuating window film
A metallised film bonded to glazing, typically quoted at 20–35 dB, and usually the highest-value single intervention because glass is the dominant entry path for outdoor RF.
Last verified 12 August 2026.
Also searched as: EMF window film, metallised film, solar shielding film
- Form
- film
- Targets
- radiofrequency
- Grounding required
- No
- Datasheet attenuation
- 20–35 dBroughly 900 MHz – 6 GHz, datasheet valuessources: sbm-2024
Failure modes
- Attenuates mobile reception inside the room as well, which is often discovered after installation
- Frame and reveal leakage limits the achievable result; film stops at the glass edge
- Some films void glazing warranties or cause thermal stress on toughened units
- Low-E glazing already provides significant attenuation, so the marginal gain can be small — measure first
Related records
- Macro cell tower (LTE / 5G sector antenna)
Sector antennas radiate on the order of 1000 W EIRP per sector on the main beam, which is aimed above and away from the tower base — ground-level exposure directly beneath a tower is usually lower than at a few hundred metres away.
Sources & emitters
- 5G small cell / street-level node
Pole-mounted nodes radiate roughly 10 W EIRP at street level, putting a residence 10 m away at about 8,000 µW/m² on the main beam — far below regulatory limits but often above precautionary building-biology bands.
Sources & emitters
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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