Info on Stucco and Plastering-September,2018-fifty-fourth issue
80 year old house leaking from lack of ledger flashing.
Kindly give me advice regarding rain water leaking through one 18'x 20'
weather side,abutting a second floor patio. The water drips down to the
outside beam in the room underneath the patio. The inside of the beam is
outside part of the beam actually is the border to the outside of the patio.
As it rains the beam is saturated with water all the way to the right hand side to the outside corner of the room. Rain seems to fully saturate the beam halfway to
the middle of the room
in two or three places. The stucco facade is facing due West and it is
when it rains,and buckets usually fill up a quarter during very windy
with the wind & rain blowing into the west facing stucco wall. The patio is covered
totally with Karnak all weather roof cement.
This large leak has supposedly been going on for over 50 years. How should
approach waterproofing the stucco. The stucco wall has original layers of
oil and latex
paint on it. During a recent rainstorm while shining high powered light
wall, one could see many yellow lines where water is seeping through. From
painted side stucco wall one only sees a few cracks. It seems there are many
in the original stucco, but how can one inexpensively waterproof this stucco
Hypothetically,could one place the all weather Karnak tar roof cement over
stucco wall as a first coat, then flashing material over the entire surface,
add a second coat of the more rubbery oil & tar Leak Stopper product? I am
solve this major leak without a mayor expense. Can Thuroseal or Xypex be at
with this problem with unknown old stucco material?
Kindly,advise me as to your suggestions. I live in Jamaica/Briarwood,
Queens County/Long Island part of New York City.
Your stucco is leaking from a lack of ledger flashing. Either there is no ledger flashing, or the old steel flashing has rusted out.
No need to go to the extreme by putting waterproofing on the whole wall.
An example of the ledger board flashing. The reason for the double ledger boards was the idea of the carpenters.
The original ledger board had rotted out and needed to be replaced. One and a half inches was cut off the deck boards
to allow space for the old board to be removed. An additional ledger board fills the space. A good idea if your ledger board
has rotted out.
Bad picture, but I hope you can see what is going on. Stucco is cut off a few inches, new tarpaper and lath, and stucco patched back.
Water will penetrate stucco, even painted stucco. This is alright provided there is a flashing at the bottom to keep water froom running behind the wall.