[HayZee518]

the sub roof is critical too! Down the street from me they put in a tin roof - green too I may add but before the roofing was put up, they stripped the asphalt down to the sheathing, put down roofing paper and 1X3 furring strips where the joints would be. Then they just laid on the roofing. They overlapped the joints and used silicone as an adhesive and weatherseal and used long colored stainless steel screws with weatherproof washers under the heads. The valleys just overlapped and were sealed with silicone.