tom wrote:
On Oct 25, 10:52 am, wrote:
On Sat, 24 Oct 2009 22:32:07 -0700 (PDT), tom
wrote:

On Oct 23, 12:27 pm, coloradotrout wrote:
http://tinypic.com/m/64p9fo/3
Right at the cursor arrow -- along that top row of shingles against
the dormer wall, there is a nail in the shingle that pushed through
the shingle. About straight below that point -- in the master bath on
the 1st floor -- the ceiling is discoloring.
First, make sure there's some flashing under the siding, and out onto
the shingles. Also, check the step flashing going up that wall to the
right of the window in the photo. I await your response. Tom
If it didn't leak before the flashing is likely OK. The popped nail is
enough to cause a minor leak.

Any idea how old this roof may be? I saw nothing about that in his
decription. Another idea may be an improperly installed bathroom vent
exhaust. Tom

If it is right downhill from the window, the window may be the problem.
Some flashing failure around that (usually at the top), and water could
be running down the wall under the siding beside it, and then down the
roof deck under the shingles. I'd start with a dab of tar on the nail,
just to see if that solves it, but spot leaks like this can be a real
needle in a haystack search.

--
aem sends...