sorry to come in here, but i missed the original post.
i agree with 'newbie' on this one, and might add you need to do some
visual research when it rains to take note of where this water comes
from, also are you at the bottom of a slope where all water from the
above properties drains to.
as far asi am aware water can be the enemy of foundations as it seeps
through the cement i have been told it weakens the structure of the
cement, in worst case scenerio could cause reinforcing to rust and
swell causing the cement to crack.
also don't recommend having gardens or trees up against the
foundations, should be app' a 2 meter buffer zone between plantings
and the foudations. all toward stable moisture levels around the
foundations. also considers termites.
anyhow for now take a look at our french/agricultiral drain
presentation you may have to consider something like this?
here is our story on our research:
how we determined the placement of the ag' drain we were involved in
first up like i said i had done a couple or 3 or 4 years of
observation, this water came
travelled through our neighbours foundations and flooded our front
yard in times of heavy
rain and the water continued to flow through his foundations and
across his underhouse
storage garage area, so at the least inconvenient for him as it was
not dry storage then,
for some days week whatever after the rain event.
anyhow after a period and as any good neighbour might i began to sell
him on the idea of
an ag' drain, yes i will be bitterly honest here if he didn't do it
above his house we
were going to have to do it along the bottom side of his boundry in
his yard to benefit
us alone, there was no option to do anything in our yard. but it would
hardly be worth
our effort for some front yard flooding.
we got on well and he could see the issue with probable failure of
cement slab and cement
stumps. so i talked him through how i saw it.
he was near the bottom of this app' 6% slope. now at the top of the
slope was another
street that storm water went direct to the adjacent wetland, a couple
houses right at teh
very top app' 200 meters up and away. so that meant abut 5 houses
could not gravity run
their storm water to the street or storm water drain as they too were
below the slope.
so as our enquiries found, the builder developer was permitted to put
in a large rubble
drain down the inside of teh back property lines of these affected
house, this rubble
drain was fed into a gravel sump (huge hole filled with gravel to
allow the trapping of
certain water and let it permiate into the clay sub soil) yes all soil
needless to say of course these sorts of systems provide a cheap
remedy and are council
apporved but have serious limitations, you see clay makes for an ideal
dam, farmers can't
have dams without clay soil, once clay saturates no more water will
flow into or through
it, why dams work so well. and later on at another suburb our next
door neighbour put in
a large car apron creating a catchment of which i indicated to him he
could not pass that
water down to us, so his builder put in such a drain system, they made
it obvious they
did not like ahving to do it, and yes in heavy or continued rain it
all flowed out the
top of the sump across our back boundry into other yards. it was like
the best most expensive treatment would have been to seek pemission to
put a pvc drain
through 2 yeards (these 2 yards efected from the overflow and it would
have saved another
2 from ever being affected) to the lower storm water drain, you can
imagine expensive hey
and ths overflow water was never going to affect him, out of sight out
anyway this drain scenerio had same/similar issues, the builder could
pemission to install a pvc drain down to the wetland then there would
be no problem for
any others, i look carefully now at topography before we buy.
so that was a major issue in my neighbours issue, some hidden ones we
found the digger
guy helped here also was a disused septic tank with the top smashed in
so they could fill
it with dirt but they didn't punch a hole through the bottom which
would have helped, the
tanks should have been removed but guess the owner then was not going
to fork out the
cash. this was the cause of why the water continued until the level
dropped in that tank.
the digger bloke pointed out that the old leach field pipes all had a
downhill flow back
toward the house, a bad plumber i would say, must have been issues
with the owners who
had it then? so we factored all that in as the job the ag' drain had
to control. the old
septic system actually had some uphill flow factor in it between the
tank and the leach
field pipes. legacy of house being built without owner supervision
there is a lesson to
be learnt there, with the home we built we were there each and every
day even then they
tried shot cuts.
we ran teh drain and connected it to a lower storm water pipe to
evacuate that water away
from his house, we use pvc in leiu of black flexable as the pvc can be
cleaned at anytime
using a plumbers eel. you can in fact make your own pvc ag' pipe by
buying normal pipe
then with a grinder cut slots down 2 sides.
anyhow all worked well in the above scenerio.
Matthew 25:13 KJV
"Watch therefore, for ye know neither
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