2012 CODE: R905.2.8.5 Drip Edge. A drip edge shall be provided
at eaves and gables of shingle roofs. Adjacent pieces of drip edge shall
be overlapped a minimum of 2 inches (51 mm). Drip edges shall extend
a minimum of 0.25 inch (6.4 mm) below the roof sheathing and extend
up the roof deck a minimum of 2 inches (51 mm). Drip edges shall be
mechanically fastened to the roof deck at a maximum of 12 inches
(305 mm) on center with fasteners as specifi ed in Section R905.2.5.
Underlayment shall be installed over the drip edge along eaves and
under the drip edge on gables. Unless specified differently by the shingle
manufacturer, shingles are permitted to be fl ush with the drip edge.
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