Made from insulating materials, thermal curtains are accessories designed to improve insulation and comfort in a home. In addition to blocking heat in summer, they reduce heat loss in winter. These devices contribute to both maintaining a constant indoor temperature and reducing energy bills. However, their performance varies depending on the fabric and manufacturing method. So, how do you know if a curtain is thermal? Follow our advice.
Materials and composition
Materials typically used for thermal curtains
The thermal insulation curtain is made from different materials:
- Insulating fabrics : Among the most used are polyester, velvet, wool and thick cotton. They can block drafts, light and cold in winter;
- thermal linings : some curtains have a thermal lining made of insulating material such as fleece to enhance insulation;
- Fabric blends : Other curtain designs are made from a blend of fabrics to maximize their thermal performance and for a more aesthetic look.
How do these materials contribute to insulation?
These materials contribute to thermal insulation in several ways. First of all, insulating fabrics have low thermal conductivity . They are particularly effective against temperature variations, as they do not allow cold or heat to spread through them. As a result, they act as a thermal barrier . Furthermore, insulating materials are known for their ability to retain and absorb heat. This contributes to the energy efficiency of a home. Note that the thicker the material, the more effective the polar or aluminum thermal curtain is. Finally, insulating materials reflect heat. They can prevent the sun's rays and extreme heat from entering the home. This way, you will always enjoy a pleasant temperature in summer.
Design and manufacturing
Design features that distinguish a thermal curtain
Insulation curtains are distinguished by their design features:
The thickness
As stated earlier, thermal curtains are very thick . This extra layer of fabric allows them to create a significant thermal barrier and reduce heat transfer.
Density
The density of a thermal curtain refers to its thickness. The higher it is, the thicker the curtain and the better it performs. Density must be considered along with other design features to test the curtain's action.
Surface treatment
Some insulated curtains have a surface treatment. This can be an anti-stain or anti-scratch treatment, an anti-static treatment or waterproofing. They can also be covered with insulating or reflective coatings.
Ease of installation
Thermal curtains are generally designed to be easy to install . This way, users will be able to fix and adjust them quickly.
Examples of manufacturing techniques that improve thermal efficiency
Wondering how to tell if a curtain is thermal? You should know that several techniques can be used to increase their efficiency. These include:
- Pleated design : thanks to the additional layers or pleats used, the thickness of the thermal blackout curtain increases, as does its insulating power;
- sealed seams : they reduce the spaces through which air escapes, which helps combat drafts;
- the use of high-quality fabrics : special fabrics with low thermal conductivity can significantly improve the performance of thermal insulation curtains.
Performance and certification
Performance standards for thermal curtains
Several indicators are used to test the performance of thermal curtains:
The thermal insulation coefficient
It represents the ability of a material to transmit heat. A low thermal insulation coefficient indicates better insulation.
Thermal resistance
This index represents the ability of a material to diffuse heat. The higher the thermal resistance , the more efficient the insulation.
Solar reflectance
It measures the curtain's ability to reflect sunlight.
The UV blocking rate
This rate indicates the curtain's ability to block the sun's rays.
The solar absorption coefficient
This value expresses the proportion of heat absorbed by the thermal curtain.
How to identify certifications and quality labels?
Thermal curtains must comply with energy efficiency standards . Among the labels and certifications used for these accessories, we find the OEKO – TEX Standard 100 label, ISO 9001 and ISO 14001. So, how do you know if a curtain is thermal? To do this, start by checking for these labels on the label. Then, visit the manufacturer's website. You will certainly find information on the certifications there. Check the curtain specifications or the FAQ section. You can also look for symbols or logos on the packaging. Finally, don't forget to read user reviews and critiques to assess the quality of the thermal curtain you are interested in. Pay attention to the comments on the labels.
Practical tests and assessments
To answer the question: how to know if a curtain is thermal, it is possible to carry out practical tests and evaluations .
Tips for testing the effectiveness of a thermal curtain at home
If you want to know how effective your thermal curtain is, you can use a few techniques:
The Flame Test
Light a candle and hold it near the curtains. If the flame is drawn towards the window, it means that the curtains are not completely blocking the drafts.
The Light Test
During the day, close your curtains completely, then turn off all sources of light. If the outside light is well filtered, this shows that the curtains are not letting heat through.
Subjective sensations
Stand near your windows when the curtains are closed. If you feel little or no drafts and the temperature inside the house is room temperature, this indicates an improvement in thermal efficiency.
Measuring temperature differences
Using a thermometer, measure the temperature difference in your home before and after installing the curtains. If the curtains are effective, you will notice a reduction in temperature differences.
Importance of evaluation according to the context of use
The evaluation of a thermal insulating curtain must always take into account the context of use . Indeed, depending on the orientation of the windows, the curtains can be exposed to different climatic conditions. Thus, you will not necessarily reach the same conclusion for the same test carried out on two curtains placed in two different places. In addition, take into account the season, because during the winter, drafts can be very strong. Similarly, consider the type of window, because a double or triple glazed window greatly influences the amount of heat lost or gained. By considering these elements, your tests will be carried out in complete objectivity.
For quality thermal curtains, trust Nokomis
To optimize your comfort and save energy, install quality insulating curtains in front of your windows. We have several models of curtains with amazing properties to meet your expectations. Whether you want to improve thermal insulation, sound insulation or both, you will find suitable solutions on our Nokomis site. Thanks to their elegant materials, our curtains will also add a touch of elegance to your interior decoration.
