The best room upgrade: $2250


I live in hot as hell Sunny South Florida. My house is open beam ceiling (no attic). Upstairs without air conditioning on is 95* +!

I finally got around to getting the roof Siliconed to knock down the heat and UVs= lower electric bill. What I didn't know was the impact it would make, quieting my listening/TV room. For the first time in 25 years, no traffic noise from nearby I-95 and I-595!!! And when I turned on the TV the sound was relaxed, not echoing in the room. I haven't yet put the stereo on, but will later today
Glad I did this before my Voyager amp arrives- any day now. I need to get a handle on how this changes the sound before I put in the system
tweak1
To clarify, the silicone is applied on top the roof
Where I used to turn my volume in the low 60s, I can hear quite a bit at < 40
OMG, the house is so much cooler, which was the point all along
If you want to investigate I got 2 estimates, the one I chose was $2250, the other $7,000! And the $2550 job was very professionally done
OP and others, thanks for all the useful and interesting information. Incidentally, we are in the process of getting our roof deck foamed for better energy efficiency in our hot, Phoenix summers. Never thought that better sound would be icing on the cake. Now I'm even more motivated.
For those that don't want the expense of a spray foam attic or silicone application, you can add an attic fan The one l have is controlled by my smart phone  It lowers my attic temp from the 120's to high 80's but there is the additional electrical cost to consider
These ideas should be thought of as room treatments as much as insulation. I was originator of ambient noise levels in listening room thread, more evidence for how minimizing that can improve the listening experience here.
Update: Im thinking the silicone set up from day one which has further improved the music.

Listened to a variety of music that I am very familiar with, including; Bonnie Raitt, Chris Isaak Heart Shaped World, Jennifer Nettles Playing with Fire, which is one of the worst recordings Ive experienced, but I love the songs. To be fair, some songs are pretty well recorded, but the title song Playing with Fire is a hot mess, but I hear so much more of the music, chorus, etc, then ever before.


Well, I finally hear a lot more of the nuances that was/were recorded. The entire sound stage has opened up in a very big way, notes are much more complete (think micro details)