Energy Efficient window treatment:  Curtains to keep heat out


Maintaining a comfortable indoor temperature becomes a primary issue as the scorching sunlight of summer or the icy cold of winter approaches your home. Although you may rely on the heating and air conditioning system to control the temperature, curtains are a frequently overlooked but affordable solution that can help lower your energy costs and keep your home comfy. This article will examine the numerous ways to use curtains to keep heat out and raise the efficiency of your house’s energy usage.

Types of curtains and fabric choices

Selecting the proper kind of curtain and fabric is the first step in making use of curtains to block off heat. These factors have a significant role in determining how well your curtains control the temperature inside.

Thermal or blackout curtains:

These types of curtains are especially made to protect your home from changes in outdoor temperature. In the winter, they trap heat, while in the summer, they block heat. These window coverings frequently include a white reflecting backing that prevents heat and sunshine.

Dense Fabrics:

 For better insulation, use curtains made of thick, densely woven materials like velvet, brocade, or leather. These materials naturally can keep heat out.

Light Colors:

Light shade curtains absorb more sunlight, keeping the room cooler. On the other hand, dark-colored curtains absorb heat and might not be as good at keeping your home cool.

Appropriate Sizing Curtains to keep Heat Out

Your curtains must properly fit your windows to efficiently block heat. To seal the window, curtains should ideally go beyond the window frame on both sides. The additional cloth aids in reducing heat transfer between the interior and exterior as well as pollutants.

Pair of curtains

Consider using twin curtains to keep heat out with better insulation capabilities. You can hang a heavier, insulating curtain in addition to a sheer curtain using a twin curtain rod. You may draw the sheer curtain during the day to let in natural light while yet keeping some of the heat out. You may draw back the insulating curtain at night to keep the room at an appropriate temperature.

Hardware and Sealing

Make sure your curtains are correctly sealed to get the most heat-blocking power out of them. This involves sealing them firmly up against the floor, ceiling, and wall. To seal edges in place, you can use magnetic tape or Magnetic strips. You can also add a pelmet or valance on curtains to keep heat out.


When you open and close your curtains, the exact moment might have a big impact on how much energy you save. Keep your curtains drawn on the sunny side of your house during the hottest time of the day. On the other hand, to let the warmth of the sun in during the winter, open the curtains on the bright side.


Curtains need care to be functional, just like any other component of your house. Their insulating abilities can be compromised by dirt and dust. For continued cleanliness, regularly vacuum or shake out your curtains. While some curtains can be machine washed, always read the care instructions before washing them.

Optional window coverings:

You can think about utilizing additional window treatments in addition to curtains to block the sun’s heat. For further insulation and control over light, curtains, shades, or window films can be used in conjunction with curtains.


The use of curtains to keep heat out can be essential in preserving a pleasant home temperature while saving money on energy. You may increase the energy efficiency of your home by choosing the right kind of curtains, and by using the correct measurements, sealing, and maintenance. Managing when and how you utilize curtains can also result in further cost savings and comfort.

Therefore, when it comes time to replace your window coverings, think about investing in heat-blocking curtains as a wise move for both your home’s energy efficiency and your wallet as well.

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