The Role of Curtains Play in Insulating Your House

Curtains are window coverings that serve a variety of functions. They offer privacy, security, are cost-effective, can complement any home d├ęcor, are easy to clean, and most importantly, they offer extra insulation. Having curtains is important, especially during the winter. Discover below the role of curtains play in insulating your house.

Insulated curtains help keep warm air from escaping through the windows, the origin of heat exchange in almost all homes. This prevention of heat exchange will ensure your temperature remains constant without depending heavily on the thermostat.

“The air conditioner requires a lot of electricity. Therefore, less usage will prove beneficial to your bank account and bills.” Says Cranbourne Air Conditioning, a Melbourne heating and cooling company with decades of experience.

Curtains help maintain your room temperature by shielding your rooms from the different types of heat loss. They include radiation, infiltration, conduction, and convection. Insulated curtains slow down the movement of heat from warm areas to cold areas. Variation of the insulation depends on the type of curtains you purchase.

Most curtains have;

  • Reflective vapour barriers that obstruct moisture.
  • High-density foams, blocking sound waves and heat exchange.
  • Outer decorative layers shielded by interior linings.
  • Reflective films, directing heat into the house.

The layers insulate your room windows against the cold outside. Some curtains also have magnetic strips sewn into the edges of the curtains and the adjacent walls. The magnets create a tighter shield with the wall, compared to typical free-hanging curtains. They add layers of protection that insulate your room against the cold weather.

Blackout curtains are also effective solutions to insulate your home. The nature of blackout is to trap heat in the room by blocking light from outside. They are mostly used when one is living in an urban setting full of lights. Covering your windows with blackout curtains keep the little heat left in the room while also blocking any form of heat or cold coming in through the windows.

Dense curtains also help to insulate your house. Not all fabrics are effective in keeping cold air from entering your home. Lightweight materials such as sheer cotton, lace, and line, are lightly woven, allowing cold air into your rooms quickly.

However, dense curtains made with tightly woven textiles such as denim, velvet, tapestry, suede, and tweed ensure a thick barrier that prevents cold air from escaping in. Before installing dense and heavy curtains, ensure the rail rods are strong and stable enough to hold the weight.

Layering your curtains also reduces heat exchange at the window by blocking excessive light and heat. The benefit of layering curtains is you get to test your designing capabilities. You can attach a fabric lining to a solid-colour type of curtain to add functionality, such as insulating the room.

Proper installation of curtains ensures warm air does not escape the room. At the same time, it keeps the cold from penetrating the windows from unseen angles. If you want to block cold air from escaping through gaps found under the ceiling and on top of your curtains, you can add cornice above your draperies.

While covering your windows, hang the curtains broader than the frames. Allow the curtains to touch the floor and push them close to the windows to prevent cold air from penetrating tiny spaces.

If it is sunny and you anticipate rainfall later in the day, week, or month, it is a good idea to open the curtains. The idea is to let the heat come in so that during winter, or when it’s raining, the house will be sufficiently warm. Install lightweight curtains that allow maximum sunlight to pass through. Once the house is sufficiently warm, you can install the blackout or insulated curtains to insulate the room.

The next time you go to buy curtains, insulation should be among your factors for choosing curtains. Depending on your needs, consider the fabric, size, and weight. A larger curtain is suitable for insulation. Tightly-woven fabric curtains are also good for insulation.


Curtains play an important role in insulating your house. They keep bringing in light, and that insulates the room. Simultaneously, curtains can block cold air from entering the house if the proper fabric is used and if the curtains are correctly installed to ensure no cold air escapes tiny spaces.