I live in Los Angeles and have 2 units on my property. I use the front one as my office. I had the floors done years ago and thought I would get tile and have a subfloor of cement put in so that I would have a lot of thermal mass to keep it from getting hot. Sadly, I think it's worse than it was before. The main window that points south got changed too to Low E and it heats up early. Some light comes in from east facing windows but not much. The house has a garage underneath.
Here are next steps I am considering:
- insulate the floor: there are beams in the garage, so if I filled them with bats then closed them, that would make a total area that would be VERY deep and should be very high R value
- take other measures to prevent sun in the east-facing windows (like time-controlled electric shades)
- start keeping the garage closed (though it's open now if you go in it even on a hot day it's not really hot as it has one foot thick walls on all sides and is built into a hill)
- put in a solar-powered roof deck attic fan (should have done this a long time ago)
BTW, the roof is a composite and has solar panels on it which I thought would also lower heat buildup.