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How To Block Light From The Top And Sides Of Curtains | Comprehensive Guide

The main objective of curtains is to block the light and maintain the privacy of your place. If a window covering does not fulfil this purpose, it is just a piece of fabric, not a curtain. It does not matter how expensive and luxurious the curtains you bought are, but you must be bothered by the light coming from the top and sides of the curtains. 

The leaking sun’s rays from the top and sides of the curtains seem very irritating and do allow you to sleep in complete darkness. But stop worrying about this problem. In this blog by Wall Curtains, we will explain how to block light from the top and sides of curtains. So read it carefully and resolve this problem quickly.

block light from curtains

Ways To Block Light From The Top And Sides Of Curtains

No matter how perfectly you install the curtains or buy curtains of accurate size, gaps must be left where the light enters your place. Here are some ways that will help you cope with this issue.

Install A Pelmet Box

Installing a pelmet box is one of the easiest and quickest ways to block light from living room curtain gaps. This box is usually made of wooden frames and covered with fabrics. It is installed at the top of the window curtain to block light coming from the top of the curtains. 

Moreover, the pelmet box also helps hide the curtain rods and tracks, providing an elegant and sophisticated appearance. Its installation is very simple and quick. Here are the tools that you will require during curtain installation:

  • A pelmet box with your desired fabric 
  • Some brackets and bracket screw
  • Measuring tape or ruler
  • Drill for drilling holes


Follow these easy steps to install the pelmet box by yourself. 

  1. Mark the center of the box with a pencil by using the measuring tape
  2. Now measure the bracket points on the wall and drill holes
  3. Place the brackets with the help of a screw at the hole and check their level with a level balance
  4. Lastly, install the pelmet onto the bracket.  

Use of Valance

Valance is a piece of curtain that mainly covers the top of the window. The valance can also be used as a decorative element, as it drapes a scarf-style valance. The light-blocking capacity of the valance depends upon its fabric thickness. 

  • Use A Magnetic Tape 

To avoid light leaking from the top and sides of the curtain, use magnetic tape. This tape is available at hardware stores and is perfect for fixing blackout curtains. Magnetic adhesive tape is glued down at the edges of the window curtains and attached to them. This method will leave no gap from where the light can enter your space. Ultimately, you can enjoy complete darkness. 

  • Install Privacy Film 

Installing privacy films on your window panes will also help block incoming light. These films are designed using mesh-like materials. Their primary purpose is to provide privacy. Meanwhile, these screens block the sunlight and keep your place cozy and relaxed. 

  • Wrapping Around The Curtain Rod 

No matter what type of curtains you have at your place, wrap them around the curtain rod and allow them to flow over the window. This practice will block 100% leaking light from the top of the window. Additionally, there is no need to use any accessories during the process.

  • Pair The Curtains With Blinds 

Pairing the curtains with blinds will maximize the light blocking at your place. If you are using sheer curtains, you can pair them with blackout blinds. Both of these window treatments combine to provide complete light blockage and also minimize the leakage of light from the top and sides.

Tips To Maximise The Light-Blocking Efficiency Of The Window Curtains 

Here are some tips and tricks that will help improve your window curtains’ light-blocking efficiency. Have a look at them: 

  1. Always buy curtains made of thick fabrics like velvet. Also, ensure that the curtain is woven tightly with high knot density to block light passage. 
  2. Remember to take precise measurements of your window before buying the curtains. The curtain’s length and width should be 3 to 4 inches more than the actual window. This will help provide full window coverage. 
  3. Always hire a professional installer to install the custom or ready-made curtains. The experts know how to install the curtains precisely to minimize the gap on the side and top. 

Final Words

These are some tips and tricks to block light from the top and sides of the curtains. We list methods that will not require much time and money. The most important thing is to always make sure to purchase windows from a well-known brand, as such brands offer warranties on their products, and their curtains last longer.