Bringing new understanding to the term "flexible" 10 ft 1/2 in diameter PVC pipe can be bent to wedge between the ground (in this case also supported by the fencing) and the shed (which is slatted so that the upward tension is resisted and keeps the PVC pipe "secure"). An old shower curtain is the weather proofing at the access. Large plastic clothes hangers are what keep the tarp affixed to the PVC. Old fence post is used for the weather proofing at side opposite access. Nylon twine secures PVC or fencing at grommets or between slats. On 66" piece of 2" diameter PVC is friction fit between the shed and the fence to keep the weather proofing fence slats stabilized, as well as the arced PVC. The arced PVC also holds the tarp on the shed side, pinning it to the shed surface. Everything still needs to be stabilized to a far greater degree. Holes will be drilled in PVC for securing features, as well as nails for fence slats, and PVC joining (ie. T joiners...