Asphalt shingles as drip edge. Common practice?
John Clark| Posted inGeneral Questionson
Is it common practice for roofers to use another course of shingles as the drip edge over the gutters?
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Replies
John, I've never seen that, aside from some homes in the Cleveland area with asphalt shingles that curve over the fascias so it resembles a thatched roof. It's common on old homes in New England to have used cedar shingles as a drip edge along the eave, rather than a metal drip edge, and it works pretty well if you want a historical look, though I'd rather have a metal drip edge.
Of course the starter course of asphalt shingles needs to be doubled up with a half-height course, which can be either purchased or made, or some roofers just double up a full course. But there should be a separate drip edge of some sort.
thx
John,
It is common up here (Toronto). When dealing with roofers I always have to make sure they put in an actual drip edge. Over time the shingle drip edge tends to crack and leak rotting the fascia boards.
thx
I'd say less than 5% of builders here include a metal drip edge.
Drip edge is required by code (this from the 2015 IRC):
R905.2.8.5 Drip edge.
A drip edge shall be provided at eaves and rake edges of shingle roofs.
Interestingly, the code does not include the term drip edge in its glossary. And this section of the code does not specifically say of what the drip edge must be made BUT it does say that the drip edge segments must be overlapped a minimum of 2 inches.
Peter