We have removed the floor and reached the wooden beams as you can see in the picture. I was thinking of using vinyl, but under the vinyl, I was planning to use chipboard 22mm and gypsum board 13mm on chipboard. Why? Because I live in a big city and want to rent my renovated basement to a student, so I want to "isolate" sound.
My house is 1.5 stories with a basement.
Am I thinking correctly with chipboard and gypsum? Or is just chipboard enough?
I chose the thickest chipboard because I also thought it was best for insulation. Right?
To make it soundproof, it first needs to be completely airtight so that sound cannot pass through cavities. You can achieve this with chipboard carefully glued and by sealing all joints very carefully with acrylic sealant.
The next step is to increase the weight of the board material so that the entire board cannot resonate with the sound. Bass is naturally the hardest to block due to its long wavelengths. Gypsum boards are definitely an option. Previously, sand was used in the intermediate floors, which helped against sound.
Ideally, the gypsum should be laid floating on the floor chipboard, i.e., on damping material (like rubber pads), but this is probably not realistic in your case. Suitable for studio constructions.
The next step is to increase the weight of the board material so that the entire board cannot resonate with the sound. Bass is naturally the hardest to block due to its long wavelengths. Gypsum boards are definitely an option. Previously, sand was used in the intermediate floors, which helped against sound.
Ideally, the gypsum should be laid floating on the floor chipboard, i.e., on damping material (like rubber pads), but this is probably not realistic in your case. Suitable for studio constructions.
There are probably a couple of follow-up questions that should be asked before answering.
Should the råspont be removed and replaced with chipboard flooring (NOTE chipboard flooring, not "regular" chipboard)?
If everything is to be removed, should the insulation in the subfloor be replaced and if so, with what?
Or is the plan to just lay chipboard on the existing råspont?
Should the råspont be removed and replaced with chipboard flooring (NOTE chipboard flooring, not "regular" chipboard)?
If everything is to be removed, should the insulation in the subfloor be replaced and if so, with what?
Or is the plan to just lay chipboard on the existing råspont?
As Claes said, floor chipboard that is glued properly so that there are no air gaps (and seal all joints against edges/in walls) and then a heavy floor, gypsum is the best choice. That way you get a good reduction in sound transmission. After that, I think it becomes expensive for relatively marginal effect. Possibly double layers of gypsum might be worth it if there is space and it is important enough.