Dancing on a proper floor will help prevent injury, and help you build your dance skills in the safest environment possible. Building your own dance floor is a big project, but it is worth it, and not as hard as you might think.
How to Build a Sprung Dance Floor
It is important to put something between the concrete base that is already in place and the floor above to prevent moisture from getting underneath. You could use plastic for this, but tar paper is recommended as it is much easier to work with.
Next, lay the first layer of plywood. This will be the base of your floor so it is important that it is perfectly level. It will be covered so it does not have to be pretty, but it must be secure since the rest of the floor will be placed on top of this important layer.
Next, place the foam blocks on the floor. The foam commonly comes in blocks, but it may be cheaper to buy large sheets of it instead. If you buy it in sheets, you will need to cut it into 2-foot-squares. Place the blocks in a grid several inches apart and attach them firmly to the plywood. It is important that they are attached firmly so that they do not become loose over time.
Place the final layer of plywood on top of the foam blocks and attach it once you have ensured that the surface is level. It is very important that the floor does not shift from side to side, so be certain that this layer of plywood is securely attached to the foam.
Next, carefully sand the edges of the plywood so that the surface is perfectly smooth and level. This is important because any splinters could cause injury to the dancers or damage the surface. Once the surface is perfectly smooth you can add the final layer. This can be wood or Marley flooring; use whichever material is the most beneficial for the type of dance that will be performed on the floor.
Be careful to add adequate cushioning to the floor for shock absorption. It will enhance performance and reduce the risk of injuries. It is important not to take shortcuts in building your floor, not just for durability, but for safety's sake.