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Old 07-09-2010, 08:11 PM   #1
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Grading soil away from the house

I have a sided house. In the process of building up the soil a little against the house so that I can get the right pitch away from the house, I wanted to know if there was a reason why I would not want to build up the soil agains the siding. The siding goes pretty far down to the top of the old soil level, and then I can see the foundation wall begin. I have now raised the soil in this are up against the siding and graded down from there away from the house. However, a waterproof contractor says that I should never have the dirt up against the siding and that I should have 5-6 inches of foundation wall showing, and that is the level I need to begin my grading. Unfortunately, that isn't going to be possible. But I wanted to know if the way I have it now, a couple of inches up the siding, is going to cause seepage into my basement as the contractor suggested.
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Old 07-09-2010, 08:16 PM   #2
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Soil up to the siding is not code, not good for your siding (unless it's vinyl (still not ok anyway)) and not good for moisture management.

You may need a drain if for some reason you have to bring the soil up that high. Is there a reason you have start the grade there?
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Old 07-09-2010, 08:38 PM   #3
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As I understand 8" is required by code....I like 12"
Termites, carpenter ants & other bugs love when you bring the dirt closer to the wood of your house - their food
Plus it may mean more moisture & wood rotting
All depends upon siding, gutters, plants, shade etc

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Old 07-09-2010, 09:05 PM   #4
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You didn't say what type of siding you have:

Plates & Sills
�� Bottom of sill 6in min to earth (PT or naturally durable if <8in above earth) 2304.11.2.2
Wood plates and sheathing closer than 8in to earth and supported by exterior foundation walls must be PT or naturally durable. 6in OK if hardscape exterior.
�� Sill treated or decay resistant (on concrete slabs on earth) ___________ 2304.11.2.4
�� Pressure-treated wood fasteners req…. _____________________________ 2304.9.5

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