Get tips and tricks from THE EXPERTS for Building and looking after your Chicken Coop. Element #2. - Using Sound Judgment: When designing your chicken coop structure, you must use sound judgment in almost every aspect of the way. For instance, you want to use building materials in which the cleaning and disinfecting procedures will be quick and easy. The doors you install should open inwards, not outwards. You don't want your chickens roosting on your windows, so it is best to install sliding windows.