Sometimes standard is just not enough! If individual dimensions are required, the Quadro floor staircase is the right choice. The window fitting with 4 locking points ensures tightness - thus the well-tempered air stays in the room. The newly developed floor staircase with the holes already pre-drilled on the hatch box sets further standards in ease of installation and price / performance. In the warm roof, the Quadro floor staircase is the right solution.