Last year I built a budget-friendly DIY outdoor couch cover using a tarp and PVC pipe to protect our outdoor furniture from the elements. After the first rain, which felt more like a nonstop waterfall from the sky, I realized water was pooling in the middle and causing the cover to sag because the PVC pipe was flexing. So I fixed the biggest flaw by replacing the center PVC pipe with lumber to create proper water runoff. I also added small side hooks to keep the cover tight and prevent the wind