If it is going on a hard surface we recommend securing it in place with 6 galvanized Tec-screws. However it will also sit in place without being secured down for those that want to be able to move it around the yard. We recommend connecting the enclosures to your house or building with some Tunnel going to a cat door in the window or wall, to create a catrun that allows your cat to do as it pleases. You can also add some clear polycarbonate roofing to keep out the rain, allowing a dry area for a sand box. Have a sand box (litter tray) with dry loose dirt and or sand and your cat will love using it. We recommend having a litter tray inside and out.