When curtain wall IGU panels fail through seal degradation — producing the characteristic foggy appearance — we replace failed panels to restore thermal performance and facade aesthetics. Our technicians work with all major curtain wall manufacturers including Kawneer, YKK AP, Oldcastle, Vistawall, and Wausau, sourcing replacement IGUs that match original specifications for glass type, thickness, coating, tint, and spacer profile. For buildings with multiple failed panels, we offer phased replacement programs that prioritize the most visible panels while spreading costs across budget cycles. We also re-seal deteriorated curtain wall joints to restore water-tight integrity without full panel replacement.