I expect to be meeting with the "supervisor" of the roofing job, and I would find it helpful to judge an earlier comment by him. As some may know...(i've posted enough lately) my roof is three over twelve. The supervisor talked me out of my request for metal valleys. I wanted them because on the last installation I saw a lot of organic debris gather in the valley and how easily it worked its way under the shingles. Even though this would be an add on to the job which I was willing to pay the supervisor insisted that valleys on a low pitch roof was a bad idea....despite that there was going to be ice and water shield underneath it. He said that he felt certain that within three years I would have a leak because of water working its way underneath the shingles and that I would have water dripping through my windows. Maybe I heard him wrong...but I gave in thinking that maybe his crew did not have the expertise in metal valleys and that I should not force this. I was under the impression that metal vallyes are fine if they are done right. Another possibility is that he did not have the correct metal on hand (which was true) and that this would upset his schedule. Was the supervisor's position to reasonable? If not, I feel more careful to question his creditability in the future.