YSHIELD® U230 Shielding Membrane (90cm, per metre)

Product Overview

The YSHIELD® U230 is a professional-grade four-layer shielding underlay membrane delivering 111 dB attenuation — one of the highest shielding performance values YSHIELD has ever achieved in a series product. Designed for use in roofs, facades and drywall construction, the U230 functions simultaneously as a wind-tight, waterproof, thermally reflective building membrane and a high-performance RF shielding layer, eliminating the need for separate shielding and construction membranes.

The micro-needled aluminium foil layer is engineered with 200,000 tiny holes per square metre, providing exceptional water vapour permeability without any compromise to shielding effectiveness. The 90 cm width is deliberately sized to allow worldwide parcel shipping without bulky goods surcharges. Manufactured in-house at YSHIELD in Germany.

This product may incur a lead time. Please contact us for more information.

Key Features

• 111 dB shielding attenuation — among the highest ever achieved in a YSHIELD series product
• Four-layer construction: PP fleece / diffusion-open functional film / PP fleece / micro-needled aluminium foil
• Suitable for exterior roofs, facades and interior drywall construction
• Wind-tight and waterproof — rated W1 water resistance
• Thermally reflective aluminium layer reduces heat gain in summer and heat loss in winter
• Highly permeable to water vapour (sd value: 0.034 m)
• Zero VOC emissions (Class A+)
• CE Declaration of Performance to EN 13859-1:2010 and EN 13859-2:2010
• Shields high-frequency electromagnetic fields (HF) from 600 MHz to 40 GHz, including 5G FR1 and FR2
• Electrically conductive surface also shields low-frequency alternating electric fields (LF)
• Sold by the metre or in 50 m rolls
• Produced in Germany

Technical Specifications

Dimensions

• Width: 90 cm
• Length: Sold per linear metre or in 50 m rolls
• Thickness: 0.45 mm
• Grammage: 230 g/m²

Shielding Performance

• Shielding attenuation: 111 dB at 1 GHz
• Frequency range tested: 600 MHz to 40 GHz (ASTM D4935-10 / IEEE Std 299-2006)
• Surface conductivity: 0.0018 Ohm (square resistance)

Physical Properties

• Colour: Black / Silver
• sd value: 0.034 m (very high water vapour permeability)
• Tensile strength: 210–270 N/50 mm
• Tear strength: 150–160 N
• Temperature resistance: -40°C to +80°C
• VOC emissions: 0 (Class A+)

Material Layers

• PP fleece (outer)
• Diffusion-open functional film
• PP fleece (inner)
• Micro-needled aluminium foil (shielding layer)

CE Declaration of Performance

Declared to EN 13859-1:2010 and EN 13859-2:2010:

• Fire behaviour: E
• Water resistance: W1
• Tensile strength: 210–270 N/50 mm
• Tear strength: 150–160 N
• Temperature resistance: -40°C to +80°C
• Hazardous ingredients: None
• sd value: 0.034 m
• VOC emissions: 0 (Class A+)

Installation

The U230 is designed for professional installation. Application method is consistent with established practice for water-vapour-diffusible, waterproof, reflective membranes in roofs, facades and drywall construction — standard procedure well understood by builders, planners and architects.

• Membranes must always be applied overlapping, without gaps
• Holes for mechanical fastening must be kept as small as possible
• The aluminium side must always be laid towards the inside of the building — the brand imprint should be visible
• This orientation also protects the aluminium layer against corrosion

Grounding

This product has an electrically conductive surface and must be integrated into the functional-equipotential bonding (FEB) system. Grounding must be carried out by a licensed electrician in compliance with AS/NZS 3000 and applicable NCC requirements. The aluminium (silver) side must be grounded — GSX50 grounding tape must be bonded on the silver side. Failure to ground a conductive shielding surface presents an electric shock risk and compromises low-frequency electric field shielding effectiveness.

Applications

• Roof underlay shielding membrane (pitched and flat roof systems)
• Facade and external wall shielding
• Drywall and internal partition shielding
• Residential and commercial RF protection from 5G, smart meters, wireless infrastructure
• SCIF and RF-controlled zone construction (structural shielding layer)
• New construction and major renovation projects requiring integrated EMF shielding

Technical Documents

Laboratory Report (Attenuation): https://www.yshield.de/pdf/db/YSHIELD-SAFEBUILD-U230-DB.pdf

Expert Report (Attenuation): https://www.yshield.de/pdf/db/YSHIELD-SAFEBUILD-U230-Expert-report-24002-240503.pdf

Shielding performance is independently verified by an accredited external expert in addition to YSHIELD's own in-house EMC laboratory, where each production batch is tested daily.