Coping with SEALED GLASS FAILURES By Harvey Buford The author can replace a fogged glass unit on their vinyl replacement windows in about 10 minutes. Improve your company's success with sealed glass by choosing the right sealant systems, glazing details, and warranties I sell remodeling jobs, which include a broad assortment of window products. I promote insulating glass in those windows for their energy efficiency, condensation control, and comfort. But the insulating glass available today has a serious problem. Sooner or later moisture enters the dead air space between the panes and as the dew point fluctuates, condensation fogs the view. Most homeowners expect and demand a clear view, and for many it is more important than ease of operation or energy efficiency. Warranties Not