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Double Glazing Locks Repair If a double-glazed window does not close, it causes drafts that allow heat to escape. It also reduces the security of your home and puts you at risk of burglary. Double glazed window seals, hinges, and handles may break down over time. If this is the case, it could affect how your windows work and could invalidate any warranty you may have. Locks with a problem Many people put anti-burglar systems on their main doors and gates However, they tend to forget that windows are also