Hello, I would appreciate any help. We are building a pool cabana, and wondering if i put counter top to post, how far out would overhang need to be so seats were in shade? would 18" do it? Cabana will be 18 x 14 (our max space for it)... looking for best way to maximize space.. Originally had thought we'd put counters inside so they could be shaded but landscaper mentioned just making overhang out.. and that makes a lot more sense to maximize.. would appreciate any thoughts! Thanks