Marc Posted May 2, 2020 Report Share Posted May 2, 2020 I'm in the process of replacing my roof cover. The Atlas Pristine instructions for closed cut valleys say to 'cut the upper corner' of the overlaying shingles. The diagram isn't clear. I've heard that before but I'm not clear on it. Anyone know what they mean by 'cut upper corner'? Why is it needed? Thanks, Marc Quote Link to comment Share on other sites More sharing options...
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