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How to Repair Double Glazed Windows Over time, double glazed windows can be damaged over time. This can cause condensation or even a break in the seal which makes windows less efficient. It can be tempting for homeowners to fix the problem themselves. However, it's recommended to hire a reputable contractor. This will save you money in the long run and ensure that the window repair is completed in a professional manner. Cost It's important to understand what the warranty is and how long it lasts. It is imp