Frame out the ends with 1X3s, attaching them to the cattle panels with plastic cable ties (drill holes through the wood as needed) and screwing them to the base with drywall type screws. We put a solid rear panel in (where nestboxes will be installed in a few weeks, so that eggs can be collected from the outside and hens can access them from the inside. Cover the ends and the bottom couple of feet of the sides with chicken wire.

Cover the top with a silver or white tarp, the best quality you can afford for long life. Ours was 16 feet wide (perfect), but about 4 feet longer than the hoop house was long, so we lashed some 6 foot lengths of 1X2 to the cattle panels at the "front" end to hold out the extra as an awning. (The basketball hoop in the background is optional.)