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?
I'm absolutely positive that it's not coming from the skylights because
they are scattered in the middle of the roof. Water damage is only
occurring on soffits that face North, which is the direction of most
storms. Thinking of calling in a Roofer to hotmop that area but thought
about caulking the area above the L-Flashing and the portion of
shingles that overhang the roof by an inch. That idea, came after
thinking that rain might be forced through that gap by heavy wind.
Water is not coming down in buckets from the eaves but just enough
after three years to make the paper delaminate from a drywall core that
is specified to be weather resistant.
Thanks for your reply-
Bob you could try roofing cement along that edge, it won't do any harm and that
would pinpoint the problem. Sometimes leaks are hard to find. I had one travel
on a roof ten feet before it showed any signs of a leak.
Just glad I didn't use Monier Tile, leaks on that kind of roofing is
like trying to find a needle in a haystack. Thought about roofing
cement but I have to tear off about 3 squares of Thickbutt and if a
cold application will not work, the fun and games will begin when I
have to repeat the process and start all over again at square one. A
Roofer is scheduled to stop by Monday, gave him leads on a couple jobs
in the past so hopefully I can drain him for some knowledge or get a
Thanks for sticking with this thread-
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.
A drip edge sounds more like it and the shingles overhang one inch.
The flashing was basically a sheet of copper 6 inches wide, bent at a
ninety degree angle with a ~10 degree flair to deflect water on one
side. If I remember correctly, 30lb felt was used for underlayment and
the drip edge was applied on top of it. Is it possible for water to be
blown into the space between a drip edge and shingles?
Possible that the starter strips that are installed before the first
course of shingles are aligned with the first course? The first course
of shingles should be offset from the starter so the seams are not lined
up. Also, up here in the cold area, we put the water/ice shield over
the drip edge. Before water/ice guard came out, we installed the felt
after the drip edge on the eave edge, and after the felt up the rake
With a one inch overhang of shingles, I would doubt it would blow in,
but anything is possible.
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