Interpretation #7095
Published October 24, 2012
Original Request
- Code Version
- 2010
- Code
- RESIDENT
- Code Description
- Residential
- Chapter
- 9
- Section
- R905.2.8.5
- Topic
- Drip Edge
Question
Is it the intent of section R905.2.8.5 Drip Edge, to include or exclude gable/rake drip edge from this sentence: "If installed over the underlayment, there shall be a minimum 4 inch (51 mm) width of roof cement installed over the drip edge flange."
Answer Published 10/24/2012 at 9:07 AM
The base code assumes that all metal
drip edge along the roof gables, rakes
and the eaves are applied over the
underlayment. See IRC or IBC Code
Commentaries. The manufacturer�s instructions or product
approval will provide the necessary
guidance for the drip edge metal at the
gables/rakes, as the referenced section
does not address the issue.
drip edge along the roof gables, rakes
and the eaves are applied over the
underlayment. See IRC or IBC Code
Commentaries. The manufacturer�s instructions or product
approval will provide the necessary
guidance for the drip edge metal at the
gables/rakes, as the referenced section
does not address the issue.
Commentary
The intent of requiring a 4-inch width
of roof cement over the drip edge
flange, if the drip edge is installed
over the underlayment, is a Florida
Specific requirement. This requirement
is not limited to any specific drip
edge location. The reason for adding
this Florida Specific requirement in
the code was to provide an enhanced
sealing of the roof shingles and
improved wind resistance at a
vulnerable location on the roof in
Hurricane-Prone Regions. The eave drip
edge and gable/rake drip edge are both
located in the same higher turbulence
wind zones on a roof (Zone 2 & Zone 3)
and therefore require the same level of
enhanced protection.