Powder coated aluminum under deck guttering systems or under deck ceilings in Kansas City are a great addition to a new or existing wood or composite deck. An under deck ceiling adds the beauty of a finished ceiling to the underside of your deck while having the practical use of keeping the area under your deck dry and clean.nnUnder deck ceilings are a perfect way to be able use the area under your deck as a living space or as a dry storage area while at the same time giving your deck a nice finished appearance.