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How to Repair Vinyl Windows


by DoItYourself Staff

what you'll need

  • Replacement window glass
  • Vinyl jamb liner
  • Replacement balance cartridge
  • Silicone caulking
  • Isopropyl alcohol
  • Utility knife
  • Screwdriver

Vinyl windows became popular sometime in the 1990s. So if you have a house that is not more than two decades old, chances are that your windows are also made of vinyl. When talking about vinyl windows, it is important to note that only the frame is made of vinyl. Mostly, dual pane windows invariably have vinyl frames. Vinyl windows offer a number of advantages over aluminum framed windows, but what do you do when your vinyl window breaks? Here’s how you should go about repairing vinyl windows. 

Step 1 – Order Replacements

If the glass has broken, you will have to order some new glass panes. When ordering new panes, make sure that they are exactly the same size as the previous glass panes otherwise you will really have to struggle to fit them in. The best method is to note the dimensions given on the existing pane and order an exact replacement. If it is just the locking arrangement that is broken, you can either replace the entire jamb liner piece or simply replace the broken balance cartridge, depending on your skill level. 

Step 2 – Preparing the Window

Before you can carry out any repair work on the vinyl window, you will have to remove the outer sash that holds the window in place. You may also have to cut some stops depending on the design of your window. 

Step 3 – Replacing the Glass Panes

Glass panes for vinyl windows usually come in the form of integrated glass units. Once you have received the replacement glass unit, all you have to do is slide it into place into your vinyl window until it locks. If you are not replacing the entire sliding pane, but just the glass itself, you will have to make sure to remove all old traces of glass and sealant from the sliding frames. Once the glass has been installed, seal it with a thin layer of silicone caulking. Use a cloth dabbed in isopropyl alcohol to remove any stains or finger marks from the glass before it has a chance to dry. The silicone caulking will take approximately 24 hours to cure. Once this is done, simply slide the pane into the window.  

Step 4 – Installing the Jamb Liner

If you are replacing the vinyl jamb liner or a broken balance cartridge, follow the instructions given in step 2 to prepare the window. Once you have removed the sliding panes, remove the broken jamb liner by snapping it out of the window sill with a utility knife. Now simply replace this broken jamb liner with the replacement one and refit it into place. Secure the screws that hold it and your window’s sliding arrangement should be as good as new. Keep in mind that the exact method may vary depending on the design of your window.

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