Utility galvanized metal roofing for barns, sheds, etc. The 5v runs $15 per 8' sheet whereas the 2.5" corrugated runs about $10. What are the pros & cons for each type and is it worth the price difference?
The existing metal roofing started rusting at, and spread from, the nail holes punched thru the metal by the roofing nails. They were the coated nails with rubber washers made for installing that type roofing. Is there any way to prevent that when installing the new roofing? Predrilling maybe?