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The 3 performance metrics explained.
100% Blackout*:
The fabric allows no light to pass through, in real conditions. Zero halo on the edges thanks to custom-made; the 100% works over the entire installed surface, not just in the center of the curtain.
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Thermal insulation up to 7°C gain*.
The fabric creates a barrier between the cold outside air and the warm inside air in winter, and blocks solar radiation in summer. A gain of 7°C measured*, with a floor-to-ceiling drop and optimal lateral overhang.
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Sound insulation 22 dB attenuation*.
The high surface mass of the fabric absorbs sound waves before they pass through the window. 22 dB of attenuation corresponds to more than halving the perceived sound volume*. You will feel significantly less street noise.
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*Under optimal installation and test conditions.
Performance by tissue density: the complete comparison
| Category | Density | Concealment | Heat gain | Sound attenuation |
|---|---|---|---|---|
| Standard thick curtain | 150-300 gsm | 40 to 70% | 1 to 2°C | 5 to 7 dB |
| Mid-range | 300 to 500 gsm | 70 to 90% | 2 to 4°C | 12 to 18 dB |
| High performance | 500+ gsm | 95 to 100% | 5 to 7°C | 18 to 25 dB |
| Kurtens | 620 gsm | 100%* | Up to 7°C* | 22 dB |
*Data from tests performed under optimal conditions.
Why combine blackout, thermal, and soundproofing in a single curtain.
Buying a blackout curtain, a thermal curtain, and a soundproofing curtain separately poses three problems: clutter on the rod, cumulative cost, and loss of efficiency due to superposition. A 620 g/m² Kurtens curtain achieves all three performances in a single multilayer fabric panel, without compromising any of the three.
According to the World Health Organization (WHO), nocturnal noise exposure above 40 dB degrades sleep quality and increases cardiovascular risks. A curtain that combines 22 dB of sound attenuation* and 100% blackout creates the optimal conditions recommended by the WHO for restorative sleep: total darkness and significant noise reduction.
For which rooms and situations
The Kurtens blackout thermal and soundproof curtain is particularly suitable for bedrooms facing the street (noise + light), rooms exposed to cold (single-glazed windows, north-facing), children's and babies' rooms (darkness + quiet), home cinemas (total black + acoustic insulation), and home offices (concentration + thermal comfort). For large openings and bay windows, discover our custom wide-width collection and our custom bay window curtain collection.
If you are looking for a single performance.
The Kurtens curtain combines all three performances. If your main need is for a single function, please consult our specialized collections: custom soundproof curtain (priority sound insulation), custom blackout curtain (priority darkening), custom thermal curtain (priority thermal insulation). To understand the difference between a simple blackout and a thermal blackout, consult our comparison thermal blackout curtain vs. simple blackout.
Choose your color from the 7 available options (Gray, Off-White, Cream Beige, Mint Green, Green, Lilac, Blue). Select a standard size or enter your exact dimensions in the configurator. The curtain is custom-made to your measurements and delivered within 2 to 3 weeks, with free delivery in mainland France, Belgium, Switzerland, and Luxembourg.
Need help with measurements? Consult our size guide. To choose your mounting, consult our mounting guide. To choose your color, consult our color guide.
*Data from tests performed under optimal conditions.
The synergy of 3: why it's better than 3 separate curtains
Installing three distinct curtains to address three different problems is not a realistic option. One track, one installation, one investment; the Kurtens 3-in-1 curtain solves all three simultaneously without added clutter. The synergy goes beyond practicality. The three performances reinforce each other: Total blackout improves thermal efficiency: a curtain closed during the day blocks solar radiation before it heats the room. Thermal insulation improves acoustic comfort: a room at a stable temperature is perceived as quieter. Sound insulation improves sleep quality: combined with total darkness, it creates optimal conditions for deep rest.
When should you choose a 3-in-1 curtain rather than a specialized curtain?
Thermal and soundproof blackout curtains are the obvious solution if you check at least two of the three following situations: You are bothered by street, neighbour, or traffic noise; your bedroom is cold in winter or too hot in summer; you need total darkness to sleep, for a baby, or for a home cinema.
Customization: the only way to optimize all 3 performance aspects simultaneously
Each of the three performance aspects loses effectiveness as soon as a gap appears between the curtain and the wall. A standard curtain lets in light at the edges, cold air from below, and sound from the sides—all three problems at once. At Kurtens, each curtain is made to the exact dimensions of your opening with: a lateral overhang of 15 to 20 cm on each side which eliminates acoustic, thermal and light bridges simultaneously A drop to the ground of 2 to 3 cm that closes the lower joint for all three performances A height configured floor-to-ceiling or window-to-ceiling depending on your installation The result: the three performance levels are achieved across the entire surface, not just in the center of the curtain.
Ready to experience the Kurtens difference?
Frequently Asked Questions.
Can a single curtain truly combine 100% blackout, 7°C thermal gain, and 22 dB sound attenuation?
Yes, provided that the fabric has been specifically designed to combine the three properties and that each performance is measured independently. At Kurtens, the three figures are tested separately, not estimated by deduction from a single fabric characteristic.
*Results are obtained under optimal installation and test conditions.
Do the three performances mutually degrade in a single fabric?
No, they reinforce each other. Total blackout amplifies thermal efficiency by blocking solar radiation. The fabric density required for thermal insulation contributes to sound attenuation. All three properties share the same basic mechanism: a fabric with a high surface mass.
Does the 3-in-1 curtain work as well as a curtain specialized for each performance?
In terms of blackout and thermal insulation, the performance is equivalent to our specialized collections. Regarding soundproofing, the 22 dB rating is identical to our custom-made soundproof curtain collection. There is no compromise between the three; this is the advantage of a fabric designed from the outset to combine them.
Does this curtain need to be cared for differently than a regular curtain?
No, you can view the care instructions directly from the product page.
Is the 3-in-1 curtain available for non-standard sizes such as bay windows or large widths?
Yes, being custom-made, it adapts to all dimensions, including large widths, bay windows, and non-standard sizes. Please specify your exact dimensions when ordering.
Check out our guides for a perfect finish.
