vertical or horizontal: "Should the underlayment run vertical (parrallel to the sheet) or ..." - Guest User (9/21/2009) | Underlayment | Archive

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Should the underlayment run vertical (parrallel to the sheet) or horizontal (90d to the sheet) when placed on top of sheathing in a new roof?? and how much should I over lap it??		Guest User 9/21/2009	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/13910/find/
Horizontal. Lap per manufacturer instructions of either the underlayment or the roofing to be installed. Often 6".		Todd Miller Isaiah Industries, Inc. 9/24/2009	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/13911/find/