If you are buying or selling a house in Santa Ana, get an attic mold inspection before you close. General home inspectors are skilled at a lot of things, but attic mold is not one of them — they do not carry the right equipment and are not trained to evaluate it properly. You should also call us if your upstairs ceilings have dark staining, the top floor smells off, or the rooms up there feel stuffy and humid no matter what you do with the AC.
Homes with bathroom exhaust fans vented into the attic are a particular problem. Every shower pumps warm, wet air into a space that has nowhere to send it.
Santa Ana’s climate adds to this. The city sits far enough inland to get genuine summer heat, but the marine layer pushes in from the coast most mornings and overnight, running a daily moisture cycle through attics that never fully dry. Older homes — and a lot of Santa Ana’s residential stock dates to the 1950s through 1970s — were built with minimal soffit ventilation and rooflines that hold heat and dampness in. If your house is more than fifteen years old and nobody has ever looked up there, there is a real chance something is growing.