I am nee to raising chickens as well. And have had quite a bit of rain here in missouri the past couple weeks. And i was really trying to keep my girls dry. And trying to keep it on the cheap side as i dont have a lot of money to spend on a nice setup and have built everything ourselves. I found if you put river rock or peat rock ( $2.98 at home depot for 1/2 cubic sq foot bag) and then put play sand on top ( also around $3 for a 1/2 cubic sq foot bag). I made sure each layer was about a inch thick. Just make sure to put around the outside perimeter of your run as well. hope this helps