How to Block Light from Transom Windows

Transom windows add elegance and charm to any room, but sometimes, the light they let in can be too much. Whether you want to create a cozy atmosphere, reduce glare on your TV or computer screen, or simply get a good night’s sleep, there are various ways to block light from transom windows. In this article, we will explore seven effective and practical solutions to help you find the perfect option for your needs and preferences.

How to Block Light from Transom Windows

Transom windows are horizontal windows typically placed above doors or other windows, allowing additional light to enter the room. While they offer aesthetic appeal and illumination, there are times when you may want to block or control the amount of light they let in. Let’s explore some practical solutions to address this issue.

Why Do You Need to Block Light from Transom Windows?

Before we delve into the solutions, it’s essential to understand why you might need to block light from transom windows. There are various reasons, such as:

  • Privacy: Transom windows can compromise your privacy, especially if they face a busy street or a neighbor’s property.
  • Glare Reduction: The intense sunlight that enters through transom windows can cause glare on screens, making it challenging to work or watch TV.
  • Better Sleep: If your transom window is in the bedroom, blocking excessive light can help improve your sleep quality.
  • Temperature Control: Blocking light can also help regulate the temperature in the room, preventing it from getting too hot during sunny days.

Now, let’s explore the different methods to achieve the desired level of light control.

1. Black Out Window Film

Blackout window film is an excellent solution for blocking light from transom windows effectively. This adhesive film sticks directly to the glass surface, completely blocking out light and ensuring your privacy. It is an affordable option and relatively easy to install.

2. Black Out Curtains or Window Roller Shades

For a more traditional approach, you can opt for blackout curtains or window roller shades. These come in various designs and colors, allowing you to choose the one that complements your interior decor. When closed, they cover the entire window frame, blocking out light and offering superior glare reduction.

3. Curtain Sheers

If you prefer a softer look and wish to filter some light while still maintaining privacy, curtain sheers are an excellent choice. These lightweight and translucent curtains fit the window space and diffuse the incoming light, creating a cozy and inviting atmosphere.

4. Window Tint Treatment

Window tinting is a practical solution to reduce the brightness and heat caused by direct sunlight. Tinted window films can be applied to the glass, allowing you to control the amount of light that enters the room while adding an extra layer of insulation.

5. Using Aluminum or Cardboard

For a temporary fix or a budget-friendly option, consider using aluminum foil or cardboard to cover the transom window. While this may not be the most aesthetically pleasing choice, it can effectively block out light when needed.

6. Utilizing Pillows

If you have decorative pillows or cushions that are thick and large enough, you can stack them up on the window sill to block light. While this solution may not be as effective as others, it can add a unique touch to your interior design.

7. Motorized Shades: The Modern Solution

For those who crave convenience and modern technology, motorized shades are an excellent investment. These shades can be controlled remotely, allowing you to open or close them at the touch of a button, even from a smartphone app. They offer ultimate light control with a touch of sophistication.


Blocking light from transom windows doesn’t have to be a challenging task. With the right approach, you can create a comfortable and cozy space while maintaining control over the natural light that enters the room. Choose from blackout window film, curtains, sheers, window tint, aluminum, pillows, or motorized shades, depending on your preferences and needs. Enjoy your newfound light control and transform your living spaces today!


Will blackout window film damage the glass?

No, blackout window film is designed to be easily removable without leaving any residue or damaging the glass surface.

Can I install motorized shades myself?

While it’s possible, it’s recommended to have them professionally installed to ensure proper functionality and longevity.

Are curtain sheers machine washable?

Most curtain sheers can be machine washed, but always check the manufacturer’s instructions for specific care guidelines.

Do motorized shades require batteries?

Some motorized shades are battery-powered, while others can be connected to a power source directly.

Can I use blackout curtains with curtain sheers for added light control?

Yes, layering blackout curtains with curtain sheers can provide maximum light control and versatility.

Sharing Is Caring:

The Howtowise team has helped thousands of homemakers fix their household problems with step-by-step tutorials. Howtowise has been featured in The New York Times, Scientific American, Good Housekeeping, Vox, Apartment Therapy, Lifehacker, and more.