First pic below is my original 8x24 run with roofing to the edge of the nearest 20 ft section. Water ran down the HWC, along the framing and into the run. The course wood chip litter acted as a sponge and soaked up the water, dampening the 4ft sheltered area attached to the coop. Birds avoided the rain and seemed miserable
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We added a 10 inch overhang which made a world of difference during Fall rainy season. This pic is from mid- November. The snow on this southern side slides off and lands away from the base frame. Without an overhang it would pack into the HWC as snow presently is about 30 inches deep. I have plastic shower curtains tacked up leaving 8 inches at top.
During blizzards dusting of snow can get in but nothing shovel worthy.
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