FAKRO installation accessories guarantee the best combination of windows with the roof structure. The use of the insulated air-permeable underfelt collar and air tight flashing forms a complete set protecting the installed window. The application of original accessories will allow long-term, safe use of roof windows. The installation accessories reduces the risk of thermal bridges and ensure proper drainage of moisture from the area around FAKRO roof windows. The correct and fast finish of roof windows from the inside is ensured by the use of original internal FAKRO linings. The correct fitting lining elements (the lower perpendicular the upper parallel to the floor) is a very important factor because it provides adequate room lighting and air circulation inside the window recess. To connect the windows in the vertical combination, there is used Duet slat which goes perfectly with wooden elements of roof windows.