Thermal curtains are curtains designed to help improve temperature comfort around windows by reducing airflow and limiting heat transfer. At iDESCU, effective thermal performance comes from combining a suitably dense fabric with accurate, made-to-measure coverage of the window area.

Thermal curtains create an additional insulating layer between the room and the window. A dense fabric helps reduce free air circulation, while a curtain that closely covers the window and surrounding wall helps limit draughts and heat loss. Correct installation is therefore an important part of thermal performance.

Yes. When closed, thermal curtains can help retain indoor warmth by creating an additional insulating layer in front of the window and reducing cold air movement. For the best effect, they should cover the window and extend beyond its sides so that cold air infiltration is reduced.

Yes. Thermal curtains can also help reduce heat build-up from sunlight when they are closed during hot periods. Their effectiveness depends on the fabric, window exposure and how completely the curtains cover the window.

Thermal curtains can help reduce heat loss through windows and therefore may contribute to lower heating demand. The actual effect depends on factors such as the window, room, fabric, curtain coverage and installation. There is no single saving percentage that applies to every home.

Thermal performance depends mainly on the density of the fabric and how effectively the curtain covers the window. Dense fabrics, including many blackout fabrics, can reduce air circulation, while full window coverage helps limit gaps where cold air can enter and warm air can escape.

Many blackout fabrics can provide thermal benefits because their dense construction limits airflow and heat transfer. However, not every blackout curtain should automatically be described as a thermal curtain. The thermal effect also depends on the curtain's coverage and installation.

For the best thermal effect, iDESCU recommends covering the entire window and part of the surrounding wall. A ceiling-mounted track is particularly effective because the curtain can fall close to the wall and reduce air movement behind the fabric. The curtain should close fully in the evening to minimise cold air infiltration.

Yes. Ceiling-to-floor thermal curtains are recommended because they provide greater coverage around the window and help reduce air movement behind the curtain. iDESCU recommends finishing the lower edge approximately 2 cm above the floor to provide effective coverage without dragging on the floor.

For improved insulation, thermal curtains should extend beyond the window on both sides. iDESCU recommends considering curtains that extend at least 50 cm beyond each side of the window. Greater coverage can improve the insulating effect by reducing gaps through which cold air can enter.

Yes. iDESCU thermal curtains are made to measure according to the dimensions provided when ordering. Custom sizing helps achieve more complete window coverage, which is important for effective thermal performance.

Yes. Thermal curtains can be fitted to a curtain track or curtain pole, depending on the selected curtain and heading style. For maximum thermal performance, iDESCU recommends a ceiling track where possible because it allows the curtain to sit closer to the wall and reduces air movement behind it. If a curtain pole is used, a small valance above the curtain can help reduce air circulation.

Yes. Thermal curtains can be used in bedrooms, living rooms and other spaces where improved temperature comfort is important. The appropriate fabric depends on the required level of light control, privacy and interior style.

Yes. Thermal curtains can be layered with voile curtains or blinds. Voile curtains can diffuse daylight and provide daytime privacy, while thermal curtains can be closed when greater privacy, light control and temperature comfort are required.

Yes. The iDESCU App allows you to upload a photo of your own interior and visualise curtains on your window before ordering. You can compare different curtain styles and fabrics to see how they could look in your room.