The housing
Corona's median home was built in 1991, which puts most of the city in the first generation of dual-pane construction rather than the single-pane era. That changes the job. Here we are usually replacing failed dual-pane units, fogged, seal-blown, and no longer doing anything useful, rather than upgrading from single glazing. The exception is the downtown circle district, where the housing predates the freeway and single glazing is still common. Owner-occupancy is high at around 64 percent.