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    DJP1939's Avatar
    DJP1939 Posts: 2, Reputation: 1
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    #1

    Oct 14, 2008, 10:23 AM
    Cement patio, grading
    I previously asked the question concerning the slope of a cement patio that abuts the foundation. The immediate answer was 1/4 inch per foot. Our local building inspector gave the same answer. The problem is, I can't find any reference to the standard in any version of the various building codes. Can anyone tell me where to find this in the codes?
    amricca's Avatar
    amricca Posts: 851, Reputation: 92
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    #2

    Oct 14, 2008, 10:55 AM

    IBC Section 1803.3 - Site Grading
    smearcase's Avatar
    smearcase Posts: 2,392, Reputation: 316
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    #3

    Oct 14, 2008, 08:25 PM

    I had a patio that was built level by the previous owner. That small detail cost me a couple of thousand dollars to replace damaged joists in the crawl space, and drains under the concrete patio.
    I would give it 5/16 per foot or more depending on what you think will look and perform OK.
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