We've had this problem for some years, the water coming through sections of
the (outer) wall, blistering the whitewash. With the super-normal rainfall
in NJ this year, there's been some pooling on the floor also.
I have a quote from a company called Vulcan out of Newark, NJ to jackhammer
a "trench" along the base of the wall, laying in 4" pipe and somehow
permitting the underground water to seep in (under the foundation,
apparently, though I'm not clear on how it feeds to the piping) and be piped
to a sump pump, which they will also install. The pump will disperse the
water back outside. They will cement over the trench and clean up "broom
clean.". They say this is a time honored technique for alleviating the
pressure of the water on the outside of the walls. Their quote is
equivalent to $60 per linear foot.
Questions: Is the quote reasonable? Is there a better way to address this
Many thx, Ron
While this is definitely not the preferred method it may keep your basement
dry, but it is not waterproofing. By strict definition waterproofing
prevents the entry of water into the walls. The proposed method would be
better termed water management.
Couple of caveats. Make sure they are drilling the cores of each block and
that there will be permanent drainage from these holes to the sub-floor
The method they describe does not subastantially reduce the pressure on the
walls. Only exterior footer drains and a drainage medium can do that.
The price per foot really depends on how many feet you are doing. The
larger the area, the lower the per foor price. $60 is a bit stepp unless
you are doing less than 15 feet. More reasonable would be $35-45 including
Before you get into that, make sure you're doing what you should to manage
water in the first place:
o All gutters need to be clean and in good working order
o All spouts need to release away from the foundation
o Your yard *must* be graded properly, so water drains away
from your foundation
We had major-league problems til we got the best loader operator we could
find to 'fix' the grade. He did, and we're bone dry.
If you don't fix the above things, you'll probably never have a dry
Thanks for the replies. Gutters are clean and covered (gutterguard).
Downspouts go into ground. The ones in back apparently go either under the
foundation or around the sides and feed into either of two pipes under front
lawn (as do all the spout flows) and exit at curb. (I've tested them all
with a hose on a dry day, so I know even the back ones exit to front.) The
problem is in back wall, but unfortunately, there's a cement patio over the
affected area. It *was* pooling water near the house, so when we had it
overlayed with cobblestone a couple years ago, we specfically asked the
contractor to address the grading problem. He said he did. I still notice
some pooling after heavy rain, though not as bad as before. During real
heavy rain, I have noticed some backflush from junction between down spout
and the conduit into which it feeds at the ground level. Maybe I should
check the through-flow more carefully before investing in this expensive
basement treatment. Thanks for the responses, Ron.
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