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Getting ready to install roof sheathing over rafters. Problem is that this was our first attempt at installing rafters and for a variety of reasons (mostly my fault) the rafters are not flush - some are off by as much as 3/16.
Do I need to shim the rafters to get them closer? How flush do they need to be to avoid having a wavy roof?
Details: It is a 5/12 shed roof, 12x18 and we are going to put on asphalt shingles.