07.05.2023 · Words by Myles

Tips and Ideas

Can You Change The Glass In A Composite Door?

Can you change the glass in a composite door?

Can You Change The Glass In A Composite Door?

If you have a composite front door in your house, you may wonder if you can change the glass.

The answer is yes, you can! In fact, it's super easy, plus you can even add a bespoke glass design. Let's take a look at some of the steps you'll need to take when changing your glass unit.

Also, please take a look at our composite doors on our website.

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2 Reasons For Replacing Glass

Reason 1: You could change the entire glass unit in your composite door due to the glass becoming misty or from breakage. This will require removing the old glass insert and then measuring and cutting a new one to fit. You may need to use some adhesive to secure the new insert.

Reason 2: You want to change the glass style in your composite door. For example, if you have a clear glass panel, you could replace it with a frosted or stained glass panel. Or, if you have a plain glass panel, you could add some decorative elements to it, like etching or painting.

Deglazing Tools to Get the Glass Out

If you're planning on changing the glass in a composite door, you'll need to gather a few tools first. Here's a list of what you'll need:

  • A palette knife
  • Stanley knife/ utility knife (same thing)
  • A glazing hammer
  • Putty knife or double-sided tape
  • Glass cleaner
  • Safety glasses and gloves (purchased as additional items)
  • Silicone in the correct colour of the cassettes
  • An electric drill or screwdriver

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Removing Composite Door Beading

Removing composite front or back doors, and beading, is a relatively straightforward process and can be done with a few tools. First, use a glazing hammer gently knock the palette knife between the cassette and slab. This will ease the cassette away from the door.

Next, you will need to remove the screws using a screwdriver. You can use a screwdriver or a drill for this. Once the screws are removed, you should be able to gently pry the beading away from the door. Place the screws somewhere safe, as you will have to use them again.

Next, you must remove the cassette glazing clips from the door. If the unit has silicone (weatherproof seal) to the cassette/door, use a palette knife and rubber mallet to ease the outside cassette from the slab. Once the sealant is removed, you should be able to slide out the old glass and replace it with a new one.

You can also use double-sided tape to hold the glazing in place. You should only refit the interior (internal) trim once you are ready. The internal trim holds the exterior trim in place.

Removal Of Glass Retention Steel Clips

Removal of the glass retention steel clips is an easy process. However, it is important to take care when removing the clips so as not to damage the door.

To remove the glass retention steel clips used on most modern composite doors, use a flathead screwdriver to pry them off. Once the clips are removed, the glass panel can be lifted out of the door. Once the old glass panel has been removed, it is time to install the new one. It is essential to make sure that the new glass panel fits appropriately into the door.

To install the new glass panel, first, place it into the door frame. Then, use the glass retention steel clips to secure the panel in place. Ensure the clips are properly secured, so the glass panel does not fall out of the door.

If you have a composite door with glass side panels they may be slightly harder to do, so if you are unsure, consult an expert just incase.

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Can you alter a composite door?

Yes, you can change the glass and colour of a composite door.

What glass is used in composite doors?

Composite doors usually have around 4mm of toughened safety glass. You can get 6.4mm glass if you want extra safety.

How long do composite windows last?

Generally, the windows have a lifespan of 40 years. They can withstand both extreme heat and extremely cold weather conditions.


Changing the glass in your composite door is easy, but you must have the right tools and know what you're doing.

Always make sure that the original frame can accept the new product. If you need to replace the glass in your composite door, our advice is that it's best to contact a professional, as you don't want to do any damage. Choose a composite door over other materials for the best results.

Make sure to learn more from our tips and ideas.

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