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General Contractor
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Just got an ICC letter saying in 2012 IRC all roofs will have to have a drip edge... I think its a good idea, it looks a lot better with it and not a big deal to install, not to mention its not a code change, only an addition.

Here is a clipping from the code:

Section R905.1. A drip edge provides additional support for the shingles at the perimeter of the roof, minimizing curling, and directs water away from fascia and rake trim.
The IRC now requires a drip edge for all asphalt roof installations and provides direction for its proper installation. Underpayment must lap over the drip edge at the eaves.
At the rake edges (the sloped edges that are referred to as “gables” in the code text), the drip edge must be installed over the underpayment. Fastening is accomplished using nails approved for asphalt shingles and spaced at no more than 12 inches on center.

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 specified in Section R905.2.5.
Underpayment 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 flush with the drip edge.

I know most places didn't adopt 2012 code yet... but they already getting ready to make 2015 can't wait to see what else they come up with.
 
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