Since your using a dog kennel to prevent wind and rain in winter first youll need a roof of some sort, even if its just a tarp but it needs to be sloped so it doesnt collect in the middle.. You want the water to run off.. If you use a tarp, put your tarp over, tie it down good, leaving a little slack so it hangs down a little in the coop, then use a 2x4, rounded the edges of the part your going to put against the tarp, or whatever you want to use, and stand it up in the middle to hold the tarp up high in the center creating a "tent" look. For the sides you can also use a tarp, heavy clear plastic, plywood or whatever. THe Clear plastic is nice as it allows sunshine to enter. If using plastic or tarps be sure to leave some area open for ventilation..