Rather than replace the entire window system, many glass shops can swap out an old, foggy igu with a new one. · determining whether the unit can be salvaged through a repair process or requires a full replacement depends on understanding the underlying failure and the extent of the resulting damage. This guide will explain why window fogging happens, and how you can repair fogged windows in your home. · but there are a couple of solutions for foggy windows that run far short of total window replacement: Nearly all windows today, whether for new construction or replacement, have, at their heart, an insulated glass unit, or igu. By reaching out to these professionals, you can ensure a prompt and effective solution to fix foggy windows and restore the clarity and functionality of your windows. · but with advances in window repair technology, there are a few different options for solving a foggy window problem without replacing the whole window. · when searching for repair foggy windows near me, youll find several local companies specializing in foggy window repair services. Igu replacement and defogging. Do your homes windows fog up? · discover why windows fog up, repair solutions (diy & pro), and prevention strategies to keep your home energy-efficient and your view crystal clear.