My experience so far has been that water gets about 6 inches into one side of the run. Two sides are protected by a building and stay practically dry. The final side withe door I haven't noticed any real wetness either. The inside of the run stays very dry. I'm surprised the grass in there is still growing, to be honest.One thing to keep in mind with a tarp roof is that any water runoff will soak into the run itself. The only dry areas will be in the very center. That's where we keep our food, dust baths, and broody/sick pens. I also have experience with the Omlet cube and would happy to talk to you about that, if you'd like.
