This is a double glazed balcony system with safety glass and has a uValue of 1.5. The two-sash window, in which the upper sash is opened seamlessly over a 45-degree range in a top hung way and the lower sash slides out with side barriers. Opened sashes create a balcony in the loft. The large size of the balcony window ensures great illumination of the interior. The window is equipped with an automatic air inlet V40P, ensuring the optimal amount of fresh air in the room. Large opening angle of the upper sash and sliding out lower sash enables free access to the balcony edge. When the window is closed the barriers hide in the frame and do not protrude from the roof surface. They are concealed under window cladding elements, therefore they do not collect any dirt and do not spoil the appearance of the roof. Suitable for roof pitches between 35 and 55 degrees. Properties Window uValue: 1.5 W/m2K. Glazing uValue: 1.1 W/m2K. Acoustic insulation Rw: 35dB. Inert gas filled panes: argon. External glass: toughened. Internal glass: laminated, anti-burglary class P2A. Air flow: V40P. Handle: elegant. Features Innovative, large roof window in which the open sashes create a balcony. The upper sash is opened upwards, the lower forward allowing easy access to the balcony bay. The sash when opened in position from 0 to 45 degrees is supported by innovative supporting mechanism enabling to leave the sash open in any position within this range. The window is operated by the handle located at the bottom of the upper sash. Handle has a two-point locking mechanism. The sash when rotated through 180 degrees is locked by the bolt for cleaning. Automatic air inlet V40P. Both the upper and lower sashes are equipped with safety glazing unit P2. The highest quality pine wood, glued in layers, vacuum impregnated. Double coated wood with ecological acrylic lacquer in natural colour. Increased resistance to burglary - TopSafe system. A wide range of accessories. Installation range from 35 to 55 degrees.