Let me go and take some more pics of our “hoop roof” that hubby built for the un-roofed end of our run. It’s like a greenhouse that has a 2”x4” frame with pvc pipes bent into a half circle and secured through holes drilled into the frame. Then it’s covered with a reinforced clear tarp. It‘s worked great through one snowy, rainy, and icy winter!
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You can see the 1.5” pvc through the tarp (

). The half circle pieces are (I think) 12‘ long. The horizontal pieces are secured with plumbing fittings that I’ll take a pic of shortly.
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The clear tarp is longer than it is wide, so I secured the overlap with tent stakes. It allows good ventilation, but keeps the wet out.
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We didn’t trim the excess pvc, so I can adjust as necessary to keep the tarp nice and tight. I’ll add more pics later.