The modernisation of flat roofs often requires replacing old skylights or glazing, which, over the years, lose their tightness, become dull, let in too little light or fail to meet modern safety standards. FAKRO renovation windows for flat roofs have been designed with such situations in mind. Their design allows them to be installed on existing bases, which significantly reduces the scope of work, shortens the implementation time and reduces the overall investment costs. By bringing more daylight into the interior, they create a more comfortable space, and thanks to modern glazing units and multi-chamber PVC profiles, users can enjoy improved thermal and acoustic comfort compared to previous solutions. All renovation models feature an elegant, flat sash design with a glazing unit flush with the perimeter aluminium profile, giving the roof a modern, minimalist character. The blackened perimeter of the glass masks the bonding point, creating a uniform surface that looks aesthetically pleasing on both residential and public buildings.