I have built coops but my runs have always been the hoop coops. The only thing I’ve discovered is that even pressure treated wood rots on the ground. Since I have to replace the wood & my runs are stationary, I will put my runs on blocks. I’ve also used tarps to keep my birds dry, but have thought about the corrugated panels & wasn’t sure I had figured out how to apply them. Now after seeing your pictures, my plan was correct. Great job! Also a money saver!