How to Add Light Blockers to Your Window Coverings

plant in front of window blinds - how to add light blockers to your window coverings

Do your blinds or shades leak some light into your home?

This often occurs due to light gaps that form when a set of blinds or shades doesn’t fit the sides of the window it’s attached to properly. Some windows have a vinyl border, but if yours don’t, you can use the following solution to solve this problem.  

Adding Light Blockers to Cover Gaps

Light blockers, which are actually L-shaped pieces of plastic, can help you out with this issue. They sit right in front of or behind the window covering so they can block the “naked” part of the window.

These covers come in a wide range of lengths, and you can trim each one down to fit your window’s size. You can easily cut them by using scissors. However, the installation process is a bit difficult. You’ll need to peel the sticky backing off each one and then stick it to the side of the window. For maximum coverage, the closer you place the blocker to the window covering, the better.

In some cases, a small amount of light can leak through blockers, so you’ll have to experiment with their placement a bit. If you can, it’s best to find the ideal spot for a blocker before you peel off its backing to reveal the sticky side.

When it comes to light blockers, there are several colors you can choose from, so you should do your research to make sure you buy blockers in a shade that matches your windows’ trim. These products are available in two different sizes, including 1 by 1 inch and 1.5 by 0.75 inches. The latter is ideal for use with cellular shades, while the first is perfect for roller shades.

If you need help with sizing, Select Blinds can help you out. This is a window treatment company that offers a wide range of products and services. They’ll be happy to help you with your case!

The Coverings That Light Blockers Work Best With

Light blockers tend to pair well with blackout shades, and together, they cover the sides of windows perfectly. These blockers work especially well with the following types of blackout shades:

  • Blackout cellular shades
  • Blackout roller shades
  • Flat fold and plain fold Roman shades with a blackout liner
  • Flat woven wood shades
  • Blackout dual sheer shades

Light blockers are also compatible with some light-filtering shades, although a bit of light will still enter through the material used to make these shades.

However, some window coverings won’t accommodate light blockers very well, and a considerable amount of light will still leak in through your windows. Light blockers aren’t very effective when used with:

  • Roller shades
  • Hobbled Roman or woven wood shades
  • Light-filtering cellular and dual sheer shades
  • Flat and plain fold Roman shades (no blackout liner)
  • Flat woven wood shades (not hobbled, no blackout liner)
  • Pleated shades
  • Horizontal blinds

Some types of windows and coverings will never work with these blockers, thanks to the way the blockers need to be attached. Light blockers won’t work with:

  • Patio doors
  • Shallow windows
  • Plantation shutters
  • Vertical blinds and cellular shades
  • Sliding-panel shades
  • Draperies and much more

If you’re unsure of whether light blockers will work with your windows and the type of coverings you have, be sure to consult a professional before investing in any of these devices.

Image credit: Steve Johnson

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