Our friends cottage has developed a leak in the shingle roof of the
screened porch part of their cottage. The leak isn't heavy, and is
less likely to occur during a rainstorm but rather at off rain times.
e.g. seems to happen each morning. The roof construction is un-
insulated/exposed in this portion of the house. I look up and saw a
16" wide x 6" patch of damp plywood sheathing centered on one of the
The shingles are old but not curling. This is the only leak and it's
not a heavy one. One thing I noticed is that they get a heavy dew
build-up in the night time. I wasn't sure if that might be more
consistent with the leak.
I didn't get on the roof to check it but might be going back in
September when I will try to check it.
Thankyou in advance.
Point of entry for the water may well be far from the area where it
Is there a change in roof slope or a roof penetration above this
Is there mechanical equipment or duct work in the attic?
Your idea of dew as the origin is worth checking carefully.
You need to locate the leak point.
If you have running water, and a hose, use that...
Start at the lowest possible place on the roof you can, which will be
the wet wood is, and just run the hose at that point to see if you get
Then work your way upware and sideways. Leave the hose at least a
at each place.. Sooner or later the spot will get wet again, and you
have a better
idea of where to make the repair.
Usually, stuff like this is one or two shingles. If the wood isn't
rotten, it won't
need to be replaced....
Andy in Eureka, Texas
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