My new replacement double hung vinyl window sashes were just delivered, and one is missing the locks. There are divots but no holes. I can reuse the locks from the old broken sash, but can I just drill holes at the divots or is there a special tool (so that I don't break the seal or crack the glass)? Thanks.

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1 Answer 1


You can. Depending on the screws you may not even need to pre-drill (some are self-drilling or simply small enough). If you do, keep it small--just under the screw shank diameter. Plastic deforms enough that if you go bigger you weaken the hold.

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