Cotton Silence isn't just another thick curtain. It's a patented, multi-layered textile composite—developed in France and tested by an independent laboratory—designed to reduce noise and improve thermal comfort, without any construction work.
Laboratory measurements
Measured technical data
The Cotton Silence curtain was tested at an independent European laboratory in accordance with a standardized testing protocol. These results provide measured performance data, while noting that the final result depends on the actual installation configuration.
14 dB
Overall Rw index (C; Ctr) = 14 (−1; −3) dB, according to the report
28.2 dB
Maximum attenuation, measured at 5,000 Hz
🔬 Daidalos Peutz (BELAC-accredited) · 📋 NBN EN ISO 10140-2:2010 · 🔎 Report No. A-2020LAB-060-I766-44092_E
🧩 A patented multilayer complex
The acoustic performance of a textile does not come from a single material, but from a combination of materials. The Cotton Silence curtain consists of several technical layers: the first layers dampen sound waves, the overall mass of the curtain slows them down, and the internal structure limits their transmission. This design is covered by a European patent (EP 3 440 965).
Mounted on a rail and providing good coverage of the opening, the fabric barrier is continuous and performs to its full potential.
📊 How to Interpret an Acoustic Performance
The Rw index summarizes the attenuation across the entire spectrum in a single number: it is the true benchmark for comparing two products. A maximum value measured at a specific frequency (here, 28.2 dB at 5,000 Hz) represents the best point on the curve— not a uniform reduction of all noise.
Be wary of a curtain sold with just a single large number, without a lab, without a standard, and without a frequency: that’s a claimed performance, not a measured performance.
⚖️ Weight: the law of mass
In acoustics, the rule is based on physics: for the same design, the heavier a material is, the more effectively it blocks sound. The Cotton Silence curtain weighs approximately 1.35 kg/m² when assembled (excluding accessories, depending on the fabric and construction). This is the total weight of the finished curtain, not the weight per square meter of the fabric alone.
⚠️ Many “soundproof” curtains list their fabric weight (often 300 to 500 g/m²) as a measure of performance. This isn’t a fair comparison. Before you buy: Is that the weight of the assembled curtain, or just the weight of the fabric?
🌡️ Enhanced thermal comfort
The same mass and air gap that dampen sound also limit heat transfer: up to a 44% reduction in heat loss (EN 14501 standard) in winter. Actual results depend on the window, installation, and exposure.
✅ Certifications and Warranties
🏛️ Patent EP 3 440 965
Exclusive multilayer complex
Exclusive multilayer complex
🔬 BELAC / ISO 10140-2
Report A-2020LAB-060-I766-44092_E
Report A-2020LAB-060-I766-44092_E
⚖️ ≈ 1.35 kg/m²
Total assembled weight (law of mass)
Total assembled weight (law of mass)
🔥 M1 Fire Rating
Braided Model — Public Buildings / Hospitality Industry
Braided Model — Public Buildings / Hospitality Industry
🌿 Oeko-Tex® Standard 100
Tested for harmful substances
Tested for harmful substances
🌡️ EN 14501 — −44%
Heat loss (winter)
Heat loss (winter)
📐 Installation is key to performance
The roller shutter box —the main sound bridge. The shutter should extend beyond the box, ideally all the way to the ceiling.
The side overhangs —at least 15 to 20 cm on each side; otherwise, the bran will spill over the edge of the fabric.
The air gap —10 to 15 cm between the curtain and the glass—enhances the acoustic and thermal performance.
The track —provides a tighter seal than a rod: the configuration that maximizes performance.
What a Curtain Doesn't Do
The same principle applies: a curtain is not building insulation and is not equivalent to double-pane windows or a partition wall. It reduces some noise—especially at mid and high frequencies—and significantly improves perceived comfort, provided it is installed properly and covers the opening completely.
Cotton Silence technology is developed in France; the curtains are made in Europe by specialized textile workshops, made-to-order, to your exact measurements.
Measured performance, verifiable certifications, patented technology.
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