The functioning of a conservatory awning is relatively simple. The sun protection textile of the on-glass awning is installed and tensioned between two guide rails fixed to the rafters of the patio canopy. The innovative zip technology provides for increased stability and resistance against wind. Comparable to a zip fastener, the textile is guided in the rails installed on the roof. In addition, a counter draw system provides for an optimal tensioning of the textile. That way, heroal conservatory awnings are firmly held in their guide rails even in strong winds, ensuring reliable and safe operation. An electric control winds the textile up into an integrated box invisible from the outside. So the conservatory awning is optimally protected against moisture and soiling.