12mm thick sports floor underlay
12 mm thick birch plywood with T&G on 4 sides
22 mm , 3 layer with 6mm top (back layer birch and core pine) parquet with a T&G locking system and special sports lacquer (Klumpp or Bona)
The floor is mainly suitable for local sports halls and school halls. Because of the thick top layer, the floor has the same lifetime as solid floor, but outperforms it in board stability. With proper care and maintenance such floor will last for years and years.