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Foundation soil grading

Post in 'DIY and General non-hearth advice' started by tutu_sue, Aug 29, 2007.

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  1. tutu_sue

    tutu_sue New Member

    Joined:
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    Loc:
    Northern NJ
    When grading soil away from the foundation, what's the optimal distance between the bottom of the house sheathing and the soil?

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  2. begreen

    begreen Mooderator Staff Member

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    Loc:
    South Puget Sound, WA
    As much as possible is what we were told. We set the minimum at 6 inches.
  3. nshif

    nshif New Member

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    Loc:
    Pioneer, Ca (near Lake Tahoe)
    As BG said 6" More if possible, especially if you live in snow country, and an outward slope of 5% for at least 2'
  4. Highbeam

    Highbeam Minister of Fire

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    Loc:
    base of Mt. Rainier on the wet side, WA
    Don't forget about your crawlspace vents if you have a crawlspace. You don't want to cover them up or send dirt and water down the vent. I shoot for 2% grade away from the house for at least a good 10'. That's only like 3 inches so it is easy on the eyes and functional.

    I have also heard that the minimum clearance is 2" from wood siding to concrete. Which jives with the 6" for soil.
  5. elkimmeg

    elkimmeg Guest

    International codes one and two family dwellings

    Drainage the lot shal be graded so as to drain surface water away from the foundation walls
    The grade away from the foundation walls shall fall a minimum 6" within the first 10 feet

    height from wood siding 8" unless it is protected by concrete sheathing where the dept can be reduced to 4" providing rot resistant materials / siding is applied Example vinyl siding cement board or PVC material frost board Sorry the sections and sub sev ctions wer too long for me to type it all so I just highlighted the important language
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