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slab/curb water proofing

Vintage Veloce

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Joined
Feb 27, 2015
Messages
1,076
Location
San Diego
My lot isn't level so we are using a slab with footings and a 10" curb around the perimeter. On the South side (where the car door is) and on the East side the slab floor is above ground level. But on the North Side and the West side the ground rises and so slab floor is below the outside ground level, by as much as 7" at the deepest.
There is a vapor barrier under the slab, but it doesn't go under the footings (by code, apparently).

I'm in San Diego, so it is usually pretty dry. But is there anything obvious I can or should do to try and keep the inside floor dry? I guess I could put a french drain around the outside of the footings on the N and W sides if necessary...

Any other easy ideas?

C
 
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matt_i

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Joined
Mar 14, 2008
Messages
10,758
Location
SE Michigan
Don't allow the lowest point of the ground to be at the wall/slab of your building.

In other words, go out 2 feet and start digging a trench, route that water by gravity to somewhere else. Don't let it sit against the building and work its way inside.
 
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Vintage Veloce

Well-known member
Joined
Feb 27, 2015
Messages
1,076
Location
San Diego
I'm dealing with a small lot in the city... two feet away is in my neighbor's yard. ;-)
But your point is good, I will strive to give the water somewhere else to run to. Certainly no pooling against the garage, but it may be impossible to prevent some running along the foundation on the N side. I'll also have a gutter on that side.

Don't allow the lowest point of the ground to be at the wall/slab of your building.

In other words, go out 2 feet and start digging a trench, route that water by gravity to somewhere else. Don't let it sit against the building and work its way inside.
 
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