Back in March(?) a friend found us a good roofer.
This was very important, because a tenant had lots
of water coming through the ceiling in the small space
between her bed and closet. That (small) roof obviously
needed to be replaced. Then he fixed ours. Ours was
good and the old roofer re-sheetrocked and painted for free.
But the tenant still had a leak whenever there was a lot of
rain with the wind blowing towards that side of the house.
I followed the National Weather service hourly forecast graph
more closely (you can see the combination of wind velocity and
rain likelihood/amount). I sprayed water all over and nothing
came in. Stumped. The roofer came by and put some tar here
Then one weekend without rain she had a big leak. I figured it
can't be the roof anc called the plumber. The plumber looked at
the radiator in the second floor apt, pronounced it good, went
downstairs, cut a hole in the ceiling and said "There are no
pipes up there". Duh-it's an extension. He had mentioned when
upstairs that the air conditioner pan was full of water.
And that was the problem--if I sprayed water under the A/C on
the roof it came in the apartment. The roofer said the flashing was
probably bad and put down a big bead of tar along the wall-roof joint.
So far, so good, although there hasn't beed a storm to really test it.
And the house does need new siding, planned for next year, after the
taxes are paid.