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Why You Should Trust Your Double Glazing Repairs to Local Experts It is not possible to replace double glazing by yourself, however an experienced glass installer can help make the process simple and safe. It is also advisable to contact the company that sold it to see whether there is an warranty. Drilling holes in windows with mist will let the condensation out however it is only a short-term solution. Blown double glazing must be replaced in order to restore thermal efficiency. Broken window panes If a