FL80 metallised polyester netting

Declared attenuation

Each figure is the manufacturer's declaration for the frequency and the layer or coat count named next to it. The percentage is computed from the dB value, not quoted separately.

1 GHz, single layer, flat sample

80 dB — removes 100.000% of the incident power density (1 part in 1 × 10^8 gets through)

1 GHz, two layers

106 dB — removes 100.000% of the incident power density (1 part in 3.98 × 10^10 gets through)

Test method

Manufacturer-declared at 1 GHz, measured to ASTM D4935-10 or IEEE Std 299-2006, with a screening report per material.

Construction

Compact woven metallised polyester with copper, nickel and a protective coating, 80 g/m², 66 or 130 cm wide, tensile strength 220 N/mm.

Typical application

• Bonded lining on interior walls, ceilings and floors
• Intermediate layer in drywall
• Loose-laid under floor coverings

What the figure does not cover

• The declared 80 dB is a flat-sample figure; overlaps have to be conductively joined or each seam becomes the dominant leak
• Needs a level substrate for crease-free bonding, and structured surfaces must be smoothed or shielding paint used instead
• Metallised coatings degrade with abrasion, moisture and corrosion, and the loss cannot be seen
• Conductive: it must be grounded correctly to control low-frequency electric fields and to be safe near wiring

What these figures are

Every attenuation value on this page is the manufacturer's own declaration for a flat sample in a test fixture, reproduced so that products can be compared on the same terms. It is not a regulatory limit, not an independent test, and not a prediction of what a meter will read after installation — an installed shield is set by its weakest path, so the only figure that describes a room is a before-and-after measurement of that room.

Where to buy

Related records

• Metal mesh and expanded-metal screen

  Woven or expanded metal used in wall build-ups, vents and window screens; attenuation depends on aperture size relative to wavelength, so a mesh that works at 900 MHz can leak badly at 5 GHz.

  Shielding & remediation

• 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

Sources

1. woremor-fl80 FL80 metallised polyester netting — technical data — WOREMOR. manufacturer, link checked 2026-08-12.