"Bob" wrote in message

Having problems with water getting through the 30lb underlayment and
water damage showing on the soffit. Thought leakage would occur with
12
installed skylights but it's just the eaves and paper peeling off a
drywall version of soffit board. Only thing I could think of is that
rain is being blown between the flashing and shingles then finding
it's
way down the plywood. Has anyone ever fixed this problem by running a
bead of caulking on top of the L-flashing?

The L flashing replaces the drip edge, or you have drip edge and
referring to it as L flashing. Does the shingles overhang this edge? If
not, they should. If this is the problem, several ways to approach.
First find out if this is the problem before I start blabbing away.