Double Glazed Window Repairs Over time double glazing can develop problems such as mist between glass or a frayed frame. These problems are simple to fix and could cost less than you think. Contact the company from which you bought it to find out whether there is a guarantee. You should also try to resolve any issues yourself. Sealing Window seals, referred to as uPVC window repair near me seals, play an important role in the insulation of double-glazed windows. Incorrect seals can cause drafts, condensation and other problems. Fortunately damaged seals can be repaired or replaced to restore the effectiveness of your double glazing. The leakage of water between glass panes is a typical sign of double-glazed windows which need to be sealed. This moisture can damage your window frames and increase energy bills. The moisture between the glass can cause a hazy appearance that can change according to the temperature or humidity levels.