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Discussion Starter · #1 ·
Starting to install a interior French drain/sump pump system in the basement of a 1950's home. The basement is having water infiltration at the slab/wall seam.

I broke up the concrete slab approximately 16" from the wall to start digging the trench for the drain pipe and realized the top of the floor slab was even with the top of the wall footers. The footers are only about 4" thick and even with the interior walls. (sketch added for reference).

I was planning on digging down below the slab 6" - 8" to the bottom of the footer, put in the drain pipe, gravel, Hydro Channel/dimple board and concrete (like a typical french drain system), but after seeing how shallow the footers are I am not sure about digging down that deep for concerns of the clay the footers/walls sit on washing out from under.

Any advice on how best to proceed would be appreciated.

Thanks.

Paul
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sucks . alot for me would depend on what clients want or expects . but running it across an engineer might give you great info but mostly get you out liability for some future problem .
 

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So instead of stopping the water penetration, you decided to let the water keep getting in and then pumping it out with a sump pump?
And after you busted up the concrete you realize the CMU wall had a footer?
Oy Veh.
 

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Capra Aegagrus
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