How to Replace Sunroom Windows

Cozy sunroom
  • 2-8 hours
  • Intermediate
  • 0-1,000
What You'll Need
Safety gloves and goggles
Measuring tape
Masking tape
Sealant and caulk gun
Pry bar (optional)
Window glass

The concept of sunroom windows is similar to the sunroof inside your car. A sunroom provides natural light and a feeling of openness to any room. It is important to know that glass windows and doors are all vital components of a sunroom and they will all need regular cleaning and maintenance. Cracked or broken windows in the sunroom are unsightly and can be problematic because they can become the source of water leaks inside your home. It is best to carefully inspect sunroom windows regularly and replace them when they are broken or cracked.

Step 1 - Measure the Sunroom Window

Use a measuring tape to determine the dimensions of the sunroom window that needs to be replaced. Buy a glass replacement that has the exact size and texture of your window. Keep in mind there are many different types of window glass sold in the market and getting the right kind for your room will benefit both the functionality and aesthetic appeal of the room. Wear the appropriate safety equipment before you attempt to remove the glass.

Step 2 - Apply Masking Tape


Apply masking tape diagonally on the sides of each window if the glass is broken or cracked. Start from the top left corner and work your way towards the center and on the bottom right corner. Repeat the process starting from the top right to the bottom left. This will help keep the glass in one piece during the actual removal process.

Step 3 - Remove Window Frame and Trim

Use a screwdriver to loosen the screws that hold the trim in place. Remove one screw at a time until the entire trim is loose. You may need to use a pry bar if the trim is nailed in place. Remove each nail carefully and discard it. Use a hammer to tap the trim and remove it from the frame.

Step 4 - Remove Old Sealant

Use a screwdriver or scraper to remove the old sealant from the frame. Remove all traces of sealant and caulking.

Step 5 - Remove Glass

The glass should be pushed outward from the outside to help loosen it from the frame. In the case of a broken sunroom window, have a friend or helper assist you in removing the glass. One person should stand outside and push the glass out, while another person catches the glass from the inside. Start exerting pressure at the bottom or lightly tap the glass with a closed fist until the entire pane is loose.

Step 6 - Apply Sealant

Use a caulk gun to apply modest amounts of sealant within the perimeter of the window frame.

Step 7 - Insert New Glass and Window Trim

Carefully insert the new glass into the frame. Lift the glass towards the top and let set between the frame and the newly applied sealant. Let the sealant dry for at least five minutes before installing the trim.