Residential buildings quality are requirements are growing, therefore Roto offers a flexible system with endless possibilities. Forhard to reach places Roto recommendsroof window stilt-dump DesignoR4 /R6. This model has tilt axis in the middle. Designo roof window R6 was designed as an optimal complement for DesignoR8 – double articulation roof window. Roto offers a wide range of accessories that makes comfortable using this window.