I have a 21 year old 'preserved' wood foundation home & have just
replaced the front steps and landing that was over a small 10' X 6'
room in the basement. This landing (room) has only two exposed sides as
the house has a bit of an L shape to it.
I did have a leaking problem, not with the foundation, but with a
shoddy way the original owner/contractor added to the height and width
of the concrete deck and steps over the 'room'. He just did a second
pour of concrete against the vinyl siding and just sealed around the
edges with caulking.
The result was cracking of the concrete allowing water to sit on the
top plates & stringers (not preserved) of the room below and rotted
them along with some water infiltration because of the lack of
I had a contractor break up and haul away all the old concrete deck &
steps and got competitive quotes to fix the original problem with the
downstairs room (waterproofed, sloped & flashed roof etc) and to build
a preserved wood deck over, but not touching this room below.
Everything looked fine until I washed the deck off and then realized my
basement was leaking badly from the siding directly to the basement.
Looking up, I can see the siding from the exposed ceiling of this room
downstairs.I can also see the lead flashing on the wrong side of this
The carpenter had flashed the small room with lead, but did it right
over the second or third row of siding, allowing water to enter, in
particular the inside corner where it appears that this is what is
meant to happen with siding, but not if directed to the basement.
My understanding since yesterday with a lot of research and thought,
the flashing should have gone at least under the last row of siding.
By the way, the room below was built with a slight pitch to allow water
to drain off.
I feel that I am not the expert, the carpenter is and should be
responsible for fixing the problem whether or not it was done properly
before. He certainly did know what flashing was all about, but faile to
see the whole picture. Easy to see it now when the problem presents
Can anyone confirm that the flashing should go under the last row of
vinyl or should it be better and go behing the wall the to which the
sidding is attached?