Adding more mass to basement ceiling

One of the main principles described by Gervais in his book, is that mass is the most critical factor to sound isolation. However, it is not just mass on the "room inside a room", but the mass on the other side of the wall that is equally important.

Ideally my main level floor would have contained multiple levels of plywood flooring, providing extra mass to the basement ceiling. This was not the case, however Gervais provides a solution. This consists of attaching multiple layers of drywall to the underside of the main level floor, between the joists.

As you would imagine, this is no easy task. My builders have begun the work, and it is certainly time consuming but worthwhile. My next post will contain photos of the work, and some slight differences to the diagram above, that will save a lot of time.