Hi Guys, thanks for the replies. Mike, I thought I found a reference in the Builders Guide (Hot-Humid Climates)but I can not locate the reference. Thanks for the IRC reference. Norm, I checked the Florida Building Code and could not find a reference there. Do you know of one? Paul, The zero lot lines do make it difficult to get a correct slope around here also. I had a heat pump installer the other day tell me he could not get the proper clearance off of the exterior wall?! Brian, The dress is a Donna Karan original and the hair, I worked on it myself before the photo. You like?