Ross Gibson demonstrates how to use his grandfather's old hand-operated standing seam roofing tools to make the double-lock standing seams for this traditional style of metal roofing. Ross uses copper sheets to demonstrate the tools at the Slate Roofing Contractors Association of North America, Inc., 2012 conference in Grove City, Pennsylvania, USA. FFilmed by Joseph Jenkins, author of the Slate Roof Bible, 3rd edition ([ Ссылка ]).

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