Live in Houston, very hot and humid. Looking at adding radiant and additional insulation to roof in house. We have a lot of sun, and AC bills.
we live in the desert, and got our roof coated, and instantly noticed the difference, it is much more insulated, and provides protection against leak (which was the main reason we had it done)
I think you'll get more bang for you buck just going with the radiant barrier and having a continuous ridge vent.
