How to Replace Broken Glass in a Patio Door

Patio doors provide a wonderful view into the outside world.

Replacing glass

Patio doorPatio door
They let the outdoors in, and they allow us to go out doors without ever crossing the threshold. When the glass in a patio door is shattered or broken, the glass must be replaced.
Glass removal

Remove the window mulls---the trim around glass---carefully with a putty knife, small pry bar and a hammer and lay the to the side for installation. If there are any nails remaining in the trim, gently remove them. Always wear gloves to prevent injury from the glass. There is no need to remove the door for the replacement of the broken glass.

Broken glass

Remove the broken glass from the opening. Usually, tiny fragments of glass will remain stuck to the original caulk around the inside the window opening. Use the putty knife to scrape and clean any remaining glass from the surface.

Measure the empty opening, from left to right and from top to bottom. Take away 1/4 inch from both measurements. This will be the size of glass needed.

Cutting glass

Lay out the piece of glass that you purchased. Make sure the surface is flat and large enough to handle the piece of glass. Make the desired marks with a permanent marker and place a straight edge against the marks. Gently scribe the glass cutter across the line. You will need to make several gentle passes and not one deep cut. A deep cut will cause the glass to break.

Apply small bead of clear silicone caulk around the perimeter of the glass opening. Gently press the piece of glass into the caulk. Place a small bead around the inside edges of the installed glass and replace the trim, one piece at a time, paying special attention to the way the trim came off. Using the same size nails, gently tap nails into the same holes.

Things You Will Need

  • Gloves
  • Hammer
  • Pry bar
  • Putty knife
  • Measuring tape
  • Permanent marker
  • Replacement glass
  • Glass cutter
  • Caulk

Warning

  • Be careful when replacing the nails, the glass is fragile.

About the Author

Billy McCarley has been freelancing online since April 2009. He has published poetry for Dead Mule, an online literary publication, and holds a Bachelor of Arts degree from the University Of Alabama where he is also a first-year graduate student in history.