Bob F wrote:
Yong Huang wrote:
I have 4 rooms all upstairs. Below 3 are all indoors like living
room, etc. They're cool. One is above outdoor driveway. It's
noticeably warmer. I can't think of any explanation. One day I used
a thermometer to measure floor temperature. It was between 1 and 2
degrees higher than the floors of the other 3 rooms. I think that
explains it. But I don't think there's anything I can do.

Probably because this room is warmer, the previous owner noticed it
and they didn't want to use this room either. The carpet is much
thicker and less used than the rest of the upstairs. If it's because
the underside is outdoors this room is warmer, what about those many
rooms above a garage? Are they warmer too? What do you do to remedy
it? Thanks.

BTW, I remember in winter, this room is a little colder but I'll
double check that in a few months.

Check if there is insulation in the floor below that room. If not,
fully insulate it.

If you can't insulate the existing floor, you may have to build a false
"ceiling" on the carport and stuff this "attic" full of insulation.