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Replacement Glass

A high-temperature glass window may be hard to come by from your heating application's original manufacturer. Outfit your fireplace with heat resistant tempered glass, or your ceramic replacement glass for your wood-burning stove at our sister site, Fast Replacement Glass!

Tempered glass is seven times stronger than regular glass, with a thermal shock rating of 400°F. This is the safest and most durable glass replacement option for your masonry, factory-built, or zero-clearance doors. Available in different thicknesses with your choice of a clear, gray, or bronze tint. 

Pyroceram ceramic glass can be used on coal and gasketed stove applications. With a thermal shock rating of 1300°F, this amber-tinted glass comes in a variety of shapes and sizes to match your particular heating appliance!

Some important things to remember:

  • Please measure your fireplace or stove glass prior to contacting Fast Replacement Glass. This will help ensure a perfect fit for your application.
  • Glass expands when exposed to high temperatures; therefore your custom glass sheet needs to be at least 1/8" shy of the mounting surface to allow for safe thermal expansion. Fast Replacement Glass cannot be held responsible for breaks due to improper measurements!
  • Metal screws and mounting hardware will also expand under extreme heat! Please do not over-fasten hardware (this helps prevent damage to your glass when your appliance is in use). Fast Replacement Glass is not responsible for breaks due to hardware that has been secured too tightly.

How Do I Replace My Fireplace Door Glass?

Replacing the high-temperature glass window on your doors can be easily accomplished! Depending on your particular fireplace door model and style, there are many different approaches to carrying out this task. We strongly urge you to consult the owner's manual for your particular fireplace doors before replacing the glass. It is always considered “best practice” to follow the manufacturer's guidelines directly.

Just to give you an example of how easy this endeavor really is, we're going to show you how to replace the tempered glass panels on a set of bi-fold fireplace doors. Please remember: The following instructions are meant to be general guidelines. Keep in mind that they may not apply to your particular fireplace application. Always consult your owner's manual first!

  • Sturdy elevated working surface, such as a table
  • A large piece of cardboard
  • Dropcloth or soft blanket
  • Flathead screwdriver
  • Box cutter
  • Tape measure
  • Channel-lock pliers
  • New glass retainer clips (for a complete set of bi-fold doors, you will need 16 clips – 8 per side)
  1. Lay the large cardboard piece on your table.
  2. Cut a 1” x 1” piece of cardboard with your utility knife and set aside for the installation of your glass retainer clips later on.
  3. Place the drop cloth or blanket over the cardboard. This set up will help steady the panes and protect the surface from being scratched.
  4. Carefully remove your replacement glass panes from the box (there will be 4) and set them side by side on your work area.
  5. Be sure that the top and bottom rails of your bi-fold door frames are clear of debris and old retainer clips.
  6. The bottom rails (there are two - they have the door handles on them) are installed first. Make sure that the hinge joint is facing upward and the door handles are facing down.
  7. The edges of the glass panes should hang slightly over the edge of your working space so that the door handles will not contact the table's surface and create pressure points.
  8. With the handles pointed toward the floor, slide one of the bottom rails onto 2 panes of glass. Take care not to let the inside edges of the glass get caught in the hinge.
  9. Use the tape measure to guide you in placing the glass retainer clips
    • There are 3 sides to each retainer clip:
      •  front = smooth, flat
      • back = upward facing “spikes” grip the inside of rails
      • bottom = open gap
  10. Place the smooth side of the retainer clip against the glass 1-1/4” from the edges of the pane, one clip in each corner. You may need to adjust this measurement to accommodate for hinges/screw holes.
    • For example: along the bottom rail, you'll place four clips (1 at each inner and outer corner of both glass panes).
  11. Rest the 1”x1” piece of cardboard scrap that you cut earlier against the bottom outside of the rail. This will protect the rails from the pliers during the installation of the retainer clips.
  12. Grip the bottom of the rail and the top of the glass retainer clip with the channel lock pliers. Slowly squeeze the pliers and press the clip into the rail. Repeat this for the remaining 3 glass clips. 
  13. If the clips appear crooked after you have installed them, insert a flat-head screwdriver into the opening of the retainer clip. Use a gentle back and forth rocking to remove the clip – never force it out!
  14. Repeat steps 5-12 for the top rail. The glass panes should remain in the same position, with the door handles hanging slightly over the edge of your working surface.
    • Keep in mind that you will now have 8 glass retainer clips installed (4 clips per each glass pane). 
  15. If your bi-fold panels do not appear to be aligned, fold the door in half and apply firm but gentle pressure to the top of the glass. 
  16. Repeat steps 5-15 for the other side of the bi-fold doors.

For a complete visual aide, click on the instructional video below!