Is attic insulation worth it for Perris summers?
Usually, yes, because August highs average 95°F at the March AFB weather station about 8 miles away, going by 1991 to 2020 averages, and the attic above your ceiling runs much hotter than the air outside. December lows there average 37°F, so the same work helps on cold mornings too. I'll tell you how many inches you have now and whether sealing comes first before we talk about adding any.





