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Old 07-27-2012, 09:18 PM   #1
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pouring a new basement

HI. We are having a basement put on our land to we can move a cabin on top. Question is: if the land slopes down and the basement is poured 8" above grade is this high enough to minimize any problems with water pouring downhill. Basement will be constructed with water resistent material both outside and inside. The back of the house basement will be 32-40" above grade because of the slope. I am a little nervous that 8" will not be enough for front of house (entry side). Any help is appreciated. I do not know all the construction lingo so hope this makes sense to someone.


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Old 07-27-2012, 10:10 PM   #2
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It is good to have the grade around your building sloping away. And I would say this is important at least 16' out. So if you are on a slope, and you want the top of your basement 8" above grade, then come out 16' in front, dropping at least 4" over this 16'. This should create a ditch, and this ditch should drain on around to the sides of the building and to the back.

These are minimums. You want the grade to drain after you have grass growing and shrubbery installed and a 12" downpour coming at you.


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Old 07-27-2012, 11:08 PM   #3
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Don't forget the exterior drain tile and proper backfill since it is "dirt cheap" now compared to the amount that you will spend (10x as much) in the future if everything is not perfect and you sketchy plans are accurate.

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Old 07-28-2012, 03:40 PM   #4
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you could always grade the lot so that the water running towards the foundation could be directed around the sides and continue on past the foundation. Basically a shallow swale will direct the water around, like cleveman explained in their reply.

Good luck!

"You get what you pay for, and sometimes free costs more!"
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