A cold window and draughty seals can contribute to discomfort in winter. Check the glazing, seals and air leaks. A closed curtain of suitable dimensions can complement insulation around the opening; it does not repair a defective window, and fabric weight alone cannot predict a temperature gain.
Kurtens curtain features and performance
| Feature | Kurtens 3-in-1 curtain |
|---|---|
| Construction | 3 layers |
| Fabric weight | 620 g/m² |
| Thermal performance | Thermal difference of up to 7 °C, measured in a laboratory* |
| Blackout | Opaque fabric that blocks out light when the curtain is closed |
| Fitting | Eyelets, heading tape or rod pocket |
| Dimensions | Configure on the product page to suit your installation |
*Result obtained under test conditions. Performance in use depends on the window, room and installation.
| Criterion | What to compare | Kurtens | Choosing your curtain | What to check |
|---|---|---|---|---|
| Construction and fabric weight | The curtain layers and fabric weight per m² | 3 layers · 620 g/m² | Compare the construction, not just the weight | Fabric weight alone does not indicate a gain in °C or dB |
| Thermal performance | The measured result and test conditions | Up to 7 °C* | Compare measurements taken under comparable conditions | The test setup and measurement points |
| Blackout | Light passing through when the curtain is closed | Opaque 3-in-1 range | Choose according to your need for darkness | Do not confuse opaque curtains with light-filtering curtains |
| Dimensions and fitting | The area to cover and the intended fitting | Choice of colour, fitting and dimensions | Prepare your measurements before configuring | The final dimensions and support compatibility |
The Kurtens curtain achieves a thermal difference of up to 7 °C, measured in a laboratory. This test result does not guarantee a temperature gain in every home: performance in use depends on the window, room and installation.
At Kurtens, our standard sizes are designed to cover the most common windows with the recommended thermal overlaps. For an unusual window, the made-to-measure option lets you enter your exact dimensions: 15 to 20 cm overlap on each side, an adjusted floor-length drop and a height configured for your ceiling. The thermal difference of up to 7 °C is measured in a laboratory; installation alone does not guarantee this result in every home.
Yes. In summer, a thermal curtain closed in front of a sun-exposed window helps limit room overheating. Its opaque fabric reduces direct sunlight indoors. The result depends on the glazing, exposure and installation.
A cold window and draughty seals can contribute to discomfort in winter. Check the glazing, seals and air leaks. A closed curtain of suitable dimensions can complement insulation around the opening; it does not repair a defective window, and fabric weight alone cannot predict a temperature gain.
270 cm is the width of the fabric roll, not an absolute maximum curtain height. The options depend on the combination of width and height. For dimensions not offered in the configurator, contact us to confirm production and whether a joining seam is needed.
At Kurtens, our standard sizes are designed to cover the most common windows with the recommended thermal overlaps. For an unusual window, the made-to-measure option lets you enter your exact dimensions: 15 to 20 cm overlap on each side, an adjusted floor-length drop and a height configured for your ceiling. The thermal difference of up to 7 °C is measured in a laboratory; installation alone does not guarantee this result in every home.
The Kurtens curtain does not only insulate against the cold. The same 620 g/m² fabric also delivers 100% blackout and 22 dB of sound reduction*. Depending on your priority, explore our specialised collections: made-to-measure blackout curtain, made-to-measure soundproof curtain, or the blackout, thermal and soundproof collection that combines all three performances.
For large windows and patio doors, see our made-to-measure wide-width collection and our made-to-measure patio door curtain collection. To understand the science behind curtain thermal insulation, read our 2026 thermal guide.
Measure the area to cover: total window width plus 30 to 40 cm of overlap (15 to 20 cm on each side). Height from the top of the rod down to the floor. The curtain should skim the floor to eliminate cold leaks at the bottom. For a detailed guide, see our size guide.
Choose your finish from eyelets, pencil pleat or rod pocket. Our heading guide details the benefits of each system. The curtain weighs 620 g/m²: plan for a sturdy wall-mounted rod. Telescopic rods are not recommended for large windows.
14 colors are available. They all deliver exactly the same thermal performance. The choice is purely aesthetic. See our color guide.
4 standard sizes are available (100x150, 150x230, 250x230 and 300x270 cm) if your windows match. 270 cm is the width of the fabric roll, not an absolute maximum curtain height. The options depend on the combination of width and height. For dimensions not offered in the configurator, contact us to confirm production and whether a joining seam is needed. The Exact-Fit guarantee (€29.90) covers measurement errors: Kurtens remakes your curtain to the right dimensions.
Order your made-to-measure thermal anti-cold curtain
Frequently asked questions.
Is a thermal anti-cold curtain really effective?
The Kurtens curtain achieves a thermal difference of up to 7 °C, measured in a laboratory. This test result does not guarantee a temperature gain in every home: performance in use depends on the window, room and installation.
Does the anti-cold curtain also work in summer against the heat?
Yes. In summer, a thermal curtain closed in front of a sun-exposed window helps limit room overheating. Its opaque fabric reduces direct sunlight indoors. The result depends on the glazing, exposure and installation.
My home has single glazing. Is the curtain enough to insulate from the cold?
A cold window and draughty seals can contribute to discomfort in winter. Check the glazing, seals and air leaks. A closed curtain of suitable dimensions can complement insulation around the opening; it does not repair a defective window, and fabric weight alone cannot predict a temperature gain.
What dimensions are best to properly insulate a window from the cold?
The curtain must extend 15 to 20 cm beyond the window on each side and touch the floor. If the curtain is too small, the cold gets around the fabric at the sides and bottom, and the insulation is compromised. This is why made-to-measure is recommended: every window has its own dimensions. See our size guide to measure correctly.
Does the curtain also insulate against noise?
Yes. The same 620 g/m² fabric that blocks the cold also reduces noise by 22 dB*. It is the triple performance: thermal insulation, 100% blackout and noise reduction in a single curtain. To learn more, see our made-to-measure soundproof curtain collection.
What is the difference between an anti-cold curtain and secondary glazing or an insulating film?
Compare installation, compatibility with your window and documented performance of film, secondary glazing or curtains. Thickness alone cannot rank them. For a curtain, provide mounting suited to its weight and check coverage of the opening.
What is the delivery time?
Allow 5 to 7 days for manufacturing and 5 to 10 days for shipping. Each made-to-measure curtain is made to your exact dimensions. Delivery is free across Europe. The Exact-Fit guarantee covers measurement errors.
Check out our guides for a perfect result.
