1. Drill holes of 3-4 mm in diameter at angle of 45 degrees in the basis of the ridge (the distance between holes is 30 cm divided
by the length of a screw)
2. Boards are fastened to the basis by screws with flat caps at distance of 40-45 cm and angle of 45 degree, and sunk by a holder-adapter.
We recommend to use non-corrosive screws with size of 3 by 35 mm. Parquet boards are pasted in butt junctions by moisture-resistant glue.