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Perimeter Edge Flashing (PEF)

Name
MM slash DD slash YYYY
Drip Edge flashes...
If PEF is not used you can usually see light coming into a dark attic along the eave edge.
Where does a roof typically leak first?
One benefit of PEF is that it supports and prevents shingles from sagging and cracking at the eave edge.

Flashing

Shingle Starter

Does shingle starter have a continuous sealant along the eave edge?
Does shingle starter have a deck sealant on the back?

Valley

Water sheds off of a roof faster with a metal valley than an asphalt valley.
Which lasts longer?
Do asphalt valleys prevent water from crossing the center of the valley?
Which valley material tends to collect leaves/debris?
Which valley material is most likely to rot if leaves and debris gather in it?
Which valley material will you puncture or crack if you walk into it?
Underlayment should be used underneath metal valley.

Gutter Protection

Ventilation

Which is one benefit of a properly ventilated home: