Double Glazed Window Repairs Double glazing can cause problems in time, like an air bubble between the glass or frames that are rotting. These issues are simple to fix and may be less expensive than you expected. Make sure to contact the company from whom you purchased it to see if there is a warranty. You should also try to resolve any issues yourself. Sealing Window seals, also known as upvc window repair near me window seals, play significant roles in the insulation of double-glazed windows. Seals that are not properly maintained can cause drafts, condensation, and other issues. Seals that have been damaged can be repaired or replaced to improve the performance of your double-glazing. Leaks of water in glass panes is the most common sign of double-glazed windows which need to be sealed. This can cause stains, harm the window frames, and increase your energy bills.