Soundproofing

Erik, actually ASC do offer a complete soundproofing method and materials but it is complex and expensive to implement if you pay someone else to do the work, not sure the OPs building competence but if you are prepared to compeletely rebuild the roof this will work. Likely the limitation would them be the stairs and door down which will be hell to proof effectively (the door was ultimately the limiting factor in my room, no matter what heroics we went too bass leaks through it despite double doors and seals)
https://www.acousticsciences.com/products/iso-wall-system

Amusingly @audiotroy illustrates how hard this is -- 85dB is the noise level of a busy road! While 25dB reduction is impressive even at a more normal 95dB in room then 70dB out of room is the level of a vacuum cleaner. If you are looking for silence (i.e. 50dB or less) then you need some 40dB+ of isolation which is really tough to achieve. Even in my heroically isolated room my wife can still tell which tracks I’m playing when she is in the room above (leaks via doors, windows, bass through ceiling etc). The dB of the audio leak through wouldn’t be measurable (ie. its in the background room noise) but the ear is incredibly sensitive.

Thanks @erik_squires -- amusing story is the installation instructions you receive from Art at ASC -- about 30 pages of closely spaced hand written notes and diagrams! Not for the faint of heart :-)

The room does sound great however and if anyone is ever in the Portland, OR area you're welcome to take a listen

@ptss true but the proble. Is never the door it’s always the gaps around the door.