Thank you @Chris Seveney and @Bruce Woodruff for your prompt replays.
@Chris Seveney,
Does the rating also include airborne noise conductivity rates? I found this product (ProSound Reverso SoundMat) manufactured and distributed in the UK and is a bit expensive but has a good rating. From your experience, you know if there is a comparable product here in the USA of reasonable price and good quality for both impact and airborne noises.
@Bruce Woodruff,
Thanks yes I am considering using soundproofing underlayment underneath the new vinal floor, so please let me know if you know of a specific product.
Regarding the code requirement you are right here in CA The minimum ceiling height for the living space and bedroom is 7 ft, the bath could be less than 7ft but not too short. I am not planning to rent this place it is for studio and office use for us.
If anyone has an experience with this product (https://soundproofingstore.uk/product/prosound-reverso-sound...) please let me know or if you suggest a similar product of better price and availability here.
Thanks
Ab