- Mar 30, 2010
And on the flat. I always screw on the high - that way when the gasket deteriorates, it doesn't leak. Although, I've read the manufacturers specs for different sheet metal and they say to screw on the flat. None of the old corrugated was nailed on the low part of the corrugation.
A screw metal roof is still the best value in a roof, IMO. It's the only kind of roof I ever do.