I am in the process of building a new home, and my foundation walls in
the basment have moisture all around the bottom. What is it? I will
be talking to my builder this week, but want to get some peoples
opinions before we meet.
I have attached a couple pictures to show what I am talking about.
On May 13, 2:58 pm, email@example.com wrote:
If this has been recently poured I would guess that the bottom portion
of the wall is
still curing. The curing of the concrete takes place over time and
of the wall which appear wet are in just the place you would expect to
be the last
to cure, near the bottom of the hole.
When was it poured?
Is the outside backfilled?
What has your weather been in the past 2 weeks?
It looks as if you floor is not poured.
Were the walls damp or water proofed?
Is there a French drain?
Concrete is not water proof.
Concrete can be quite absorbent.
Concrete takes 28 days for the initial cure.
Keep the whole world singing . . . .
Ours was never this wet..just a few days after the forms were stripped, the
foundation was dry but it is dry here. The foundation backfill mixture was
dry..That was all done way before they got close to finishing/framing the
I see they did coat the outside of the foundation..with at least spray on
black bituminous/tar substance or some sheet chanelling product
Ok, was there gravel and draintile placed on the outside of the foundation
below (basement floor)grade and then covered with a semi permeable roll
product to keep dirt from entering the drain pipe(big "O" 4" black slit pipe
or the white 4" type with holes)
That is what you re calling a French Drain..here we call it draintile and it
must be below grade to take the water away before it gets to the floor area.
I don't know why they'd take 80 days to get it in there. It seems they've
had time to build the entire floor above and since you say its been
relatively dry, I think you re right to be concerned. It appears that the
walls are dry but that the moisture may be wicking up from the fill below
the vapor barrier. Even after the floor is poured, there is no way to stop
this if the moisture below the floor persists..wherever its coming from, 80
days after the pour..
Hopefully the drain will take care of it if its installed properly and in
the correct place(below floor grade). Perhaps all this dampness persisted
because the drain wasnt in when you got the rain and the water just ran into
the excavation soaking the walls. If there was a trench there for the
drain, I dont know how the water didnt end up below grade.
Only time will tell.
What do they have there below the plastic visqueen/vaper barrier ? Is it
ABC mixed soil sand gravel ? Seems coarser than sand.
Here they use sand, compact it, then apply the 6 mil vapor barrier, RED
(Tuck) tape the seams and them pour the floor.
I d try to get something in writing signed by the builder..at least an
acknowledgment that the matter had been discussed and any dampness must be
resolved before final payment is made. If there are plans to finish the
basement, make sure the concrete is bone dry before any framing goes in.
It appears to be a condensation problem, we have had some very hot
days lately and with the basment being below grade and much cooler,
condensation is forming on the lower parts of the foudnation walls. I
guess the best thing to do is get some fans in there and run a
dehumidifer. Any suggestions or opinions?
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