The fumigation company should give you a detailed list of all the items that are necessary to prepare your home for a fumigation. These include interior items such as bagging up all your food items into special bags, turning off gas if there are pilot lights. On the exterior you may need to rake back rock or mulch if it will interfere with the tarp on the ground. A good fumigation company will not only give you a detailed list, but will hold a pre-fumigation meeting to ensure that you are fully prepared for your fumigation.