Step by step DIY video on how to build a catio for your cats using PVC pipe, vinyl coated metal fencing and a vinyl roof. It has 2 upper levels, a ramp, a tree, and is big enough for a person to go inside as well.
Note: You may want to use heavy duty UV resistant Zip Ties. I've been told they last longer than the standard ones I used. So far, mine are holding up fine, but time will tell. I didn't learn about them until I finished my catio.
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