At VELUX's request, RENSON optimised the Topfix for mounting on the VELUX Modular Skylights. RENSON developed the Topfix VMS (Patent Pending). The Topfix VMS zenithal outside sun protection is equipped with a revolutionary tensioning technique, realized with the renowned Fixscreen-technology and was specially developed for application on the VELUX Modular Skylights modules. The Topfix VMS fits on both the fixed and movable modules, for example, with special mounting bases to facilitate perfect attachment on the VELUX Modular Skylights. The combination VELUX Modular Skylights and RENSON Topfix VMS is a - optimal product solution - recognized by VELUX and RENSON. Thanks to the famed Fixscreen technology, an unsurpassed fabric tension is realised, even in extreme wind load up to 120 km/h resulting in ripped and flapping fabrics belonging to the past.