We live with our five cats in a single family home with a fairly small, fenced backyard. We have a catdoor between the house and the back deck and over the years, I have used various versions of cat security fencing around the top of the existing fence to keep the cats restricted to just he back yard, Until, that is, our youngest pair of rescue kitties decided they wanted to sit on the top of the fence. They are brother and sister with a fairly large helping of Maine Coon in their parentage and have proven to be highly adept escape artists. The two weak spots in the fence security were the apple tree that stands next to the fence and a small enclosed viewing platform I had built at the top of one sections of fence. The apple tree was "secured" with a fixed ring barrier about 6' up the trunk. Attached are videos of Sparky and Tigger demonstrating their escape techniques on the old cat fence. Next are some shots of our new Purr...fect Fence installation and how effectively it secured these two weak spots. For the apple tree, I was able to partially split the poly mesh grid integrating it around the tree blocking their ability to use the tree to reach the fence. With the viewing platform, I was able to integrate the fence over and above their viewing platform cutting off their ability to clamber over the platform to reach the fence. Installation was straight forward with no surprises. Our yard took one day to complete. Another side benefit we've found is that the security fence is just high enough now to provide room for the roses to grow without growing into the netting.