Ok, I'll be the one. What is that hideous insulated line running up the exterior side wall of the house into the attic?Main water supply line. Is that the service running into the attic w/distribution in the attic?Yes Looks like a slab house.Correct No garage?No No way to get it inside a wall somewhere, or did they just not want to pay?Could've wen't into a tee wall, but customer did not care about the exposed lines and wanted the lowest priced method. Inspector lets you do that?Yes I know freezing is not an issue down there and maybe that is commonly done, just looks awfully funny to me, but if the customer is happy, I'm happy, ... I guess. I just see a lawnmower or something catching it and ripping it right off of the wall. I love pex but that makes me nervous. Is the insulation there to protect it from UV? Yes. A double layer of thick foil tape with zip ties on top of UV rated foam pipe insulation(the same stuff we put on solar systems on roofs) Doesn't figure to be there for protection from cold in your area I wouldn't think.Correct, only for UV and abrasion.