If the canvas is placed between the slats and the structure when closing the umbrella, holes or tears can form in the fabric due to the stresses of the wind even when the umbrella is closed or during winter storage. The video shows how a few simple taps are enough to damage the tissue; In order to prevent this from happening, it will be advisable to close the umbrella as shown in the following video.
In the video the operator shows how to correctly close the umbrella. A fundamental measure is to pull the fabric edges outwards and wrap them with the closing lace.