Remove the Window and Broken Glass
Begin by safely removing the window sash from its frame. This is particularly important for large windows, as it allows you to work on a stable, flat surface. The removal method varies with the type of window: sliders may need to be lifted out of their tracks, double-hung windows often have latches that release the sash, and casement windows may require unscrewing the hinges. Always prioritize safety by wearing protective gloves and eyewear. To prevent further breakage and injury, use painter’s or duct tape to secure the broken glass before gently removing it from the frame.
Measure Glass
Accurate measurement is key to ensuring a perfect fit for your new glass pane. Use a tape measure to determine the height, width, and thickness of the existing glass. It’s recommended to order your replacement glass slightly smaller (about 1/16 inch less) in both height and width to allow for expansion and contraction and ease of installation. Also, consider the type of window you have and purchase any additional materials required, such as glass points for wooden frames or double-sided foam tape for vinyl or aluminum frames.
Insulated Glass Unit (IGU)
If your window uses an insulated glass unit (IGU), it’s important to note that these are usually custom-made and require precise measurement for ordering. When measuring an IGU, include the dimensions of the glass as well as the spacer. Note details like the color of the spacer and any special coatings on the glass that may be important for energy efficiency or UV protection. Ordering an IGU typically involves contacting a glass manufacturer or supplier with these specifications.
How to Replace Window Glass in a Wood Frame
Replacing glass in a wood frame starts with cleaning the rabbet, the groove in the frame where the glass sits. Remove all old glazing, putty, and any metal glazing points. Before installing the new glass, it’s advisable to treat the bare wood with a sealer or linseed oil. This treatment helps protect the wood and prolong the life of the new installation. Once treated, you can proceed with setting the new glass.
Apply New Glazing and Set Window Glass
Lay a base of glazing compound along the rabbet. This compound acts as a cushion for the glass and helps create a seal against the elements. Place the new glass pane onto the compound and gently press it into place. Use glazing points to secure the glass in the frame; these small metal points are pushed into the wood around the perimeter of the pane. Once the glass is secured, apply more glazing compound around the edges, smoothing it with a putty knife to create a neat, finished look.
Paint the Window Frame
After the new glass and glazing are in place, it’s a good opportunity to inspect the window frame for any peeling or chipped paint. Applying a fresh coat of paint not only improves the appearance of the window but also adds an additional layer of protection against the elements. Use painter’s tape to protect the glass surface, and apply paint to the frame, overlapping slightly onto the glazing compound to create a seamless, weather-tight seal.
Replacing Window Glass in an Aluminum Frame
Aluminum frames typically use a vinyl strip or gasket to secure the glass. Begin by removing this strip, which may require a specialized tool or careful prying with a putty knife. Clear out any old silicone or sealant used to hold the original glass. After measuring and ordering your new glass pane, apply a bead of silicone in the frame to hold the glass in place. Carefully set the new pane in the frame and reattach the vinyl strip to secure it.
How to Replace Window Glass in Vinyl Windows
Vinyl windows often use a sash that can be removed and vinyl glazing strips that snap into place. Start by removing the sash from the window frame and then carefully prying off the vinyl glazing strips. Clean the frame to ensure a good bond with the new tape or sealant. Apply new double-sided tape along the frame where the glass will sit, and then carefully position the new glass unit in the frame. Once the glass is in place, reattach the vinyl glazing strips and reinstall the sash.
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