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Window SashesWooden sashes can have glass that is held in by glazing points and putty. The glass can also be held in by thin wooden mouldings. If the glass is broken, the mouldings can be removed by carefully cutting through the dividing line between the sash and moulding with a utility knife. Then gently prying the moulding off, hopefully in one piece. More modern vinyl sashes can also be repairable. In a vinyl sash the glass is usually held in with thin vinyl glazing strips accessible from the inside. There are a few questionable designs where the vinyl window sash is glued around the glass and you basically have to replace the entire sash if the glass gets broken. Most vinyl sashes though do allow glass replacement by just gently prying out the glazing strips all around the glass. Unlike wooden sashes, vinyl glazing strips are not as prone to breaking and the glass generally requires no putty so glass replacement is relatively easy. Aluminum sashes use a similar arrangement as vinyl sashes to hold in the glass. Except the glazing strip is usually made of a much softer vinyl which simply clips into a groove all around the inside of the sash. Unlike a vinyl window, the glass in an aluminum sash is held in with a very soft sticky butyl rubber compound that comes in the form of tape. You have to cut through the butyl rubber all around the the glass with a thin knife blade to get the glass to come out. Or, in the case of large aluminum windows, you use a pair of suction cups to progressively pull the glass off the sticky rubber. To replace the glass you need to clean all the old rubber from the frame and apply new glazing tape all around the frame. Click the Window Sashes link to get back to the home page
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