How to Make Double Glazing

Updated April 17, 2017

Double glazing your home's windows simply means to add a second layer of window panes. Between each of these layers, a thin space is created and filled with air. These air-filled spaces insulate your windows and keep your home's temperature more consistent. Therefore, the cost of heating and cooling your home can be reduced with double-glazed windows. Another great benefit is the added security of two window panes. You can significantly lower the cost of double glazing by doing this project yourself rather than hiring an expensive professional.

Use the tape measure to take accurate measurements of the height and width of each window pane you plan to double glaze. Write each measurement down on a piece of paper.

Visit your local hardware store with your measurements to purchase acrylic glass. Most hardware stores will cut the acrylic glass sheets to fit your measurements, but if your particular store does not, a circular saw can be used. If using a circular saw is not an option, you may want to purchase precut and prepared double glazed window panes.

Wear your safety goggles and gloves anytime you are working with power tools, such as a circular saw. With a black Sharpie and a tape measure, measure and draw the exact height and width of the window panes onto the sheets of acrylic glass.

Lay the acrylic glass sheets on your work table with the drawn measurements extended out from the table. Use two C-clamps to hold the glass in place. The blade in the circular saw should be placed in backwards so the thin edges of the blade cut through the acrylic glass smoothly. Cut out each measurement with the circular saw.

Spray a sealing foam around the four edges of the window in the area where the new window pane will be installed. Immediately line up the new window pane and press firmly into place to seal.

Allow the foam to dry for 24 hours. Once completely dry, use a utility knife to cut away any excess foam.


Do-it-yourself double-glazed window kits are available for purchase.


Always use extreme caution when using circular saws and other power tools. If you do not have experience using a circular saw, seek professional assistance to cut the acrylic glass sheets.

Things You'll Need

  • Tape measure
  • Safety goggles
  • Safety gloves
  • Black Sharpie
  • Work table
  • 2 C-clamps
  • Circular Saw
  • Window Sealing Foam
  • Utility knife
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About the Author

Melissa Lowery began her writing career in 1999 as a field reporter for the "Six Mile Post." Since 2000 Lowery has contributed to many different websites and print publications. She holds both a mastery makeup artistry and a cosmetology diploma, with more than six years experience in these fields.