I have an issue where some sections of my run (near the edges) somehow collect moisture and don't seem to completely dry. These areas are not soggy-wet but they're not dry either. My run is about 6x4 feet area and 3feet tall. The run is only for two chickens. I originally did not build a roof for the run, although it is covered by hardware cloth. I finished my coop and run during the summer. There is no natural shading of my coop and run, so I used scrap plywood to put on top to keep them shaded during the summer. Upon the first rain in the fall, the plywood stunk when it got wet, so I ended up covering the top of the run with 6mil plastic. It drapes over the top of the run like a dinner-table cloth. Ventilation/condensation isn't a problem since there is the bottom 2/3 of the run is open to the air all around the run. The bottom of my run is on concrete. My run appears to be soaking up water from underneath the retaining boards of my sandbox. I plan to elevate my entire run by adding square cement blocks to cover the entire run floor (I will need to temporarily remove the sand to do this). I hope this will keep the sand from soaking up rain water from the surrounding concrete. Do you think this will help in reducing the water soak-up of the sand from water on the ground? As for the top "moist" spots, I get the feeling they are not drying because top of the run is completely covered by plywood and is blocking all sunlight from above. I get the feeling I will have to modify my run to add an actual roof structure. My 6mil plastic sheet was an attempt at a cheap solution to last long term. It does do a great job of blocking rain and preventing water from getting on the sand during storms but since the bottom of the sides is not covered, some water does get in around the edges. This is the sand that doesn't seem to be drying. It is not a drainage issue. The sand is getting wet and given the cold, wet months we've started to have over here, it takes forever for the moist sand to completely dry. I don't imagine the girls are very happy about it. Does anyone have any suggestions? I am thinking of using the hard plastic roofing from the home improvement store and make one half opaque to provide shade and one half clear to allow warmth in that area on a cold day. Right now with the run roof completely blocking all sunlight, the sand is normally pretty cold even during the day. All suggestions are welcome! ...and yes, I have already read patandchickens muddy run page.