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  1. #1
    Join Date
    Jul 2019
    Location
    VA
    Posts
    14

    Default Shoring up an old foundation wall

    Inspected an old house today where they added a 4 ft tall foundation wall 2 blocks thick up against the original block foundation wall. in the basement. Have seen this a few times in the last few years but this time I saw a thin horizontal crack in this 4 ft wall. Struck me as odd since it was probably added to shore up an old wall. The original wall above this wall was vertical. Plan to treat this like any other horizontal crack in the report. Wondering if any of you have seen this added wall before up against an old foundation wall or a horizontal crack appearing on it.

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  2. #2
    Join Date
    Sep 2009
    Location
    Rolla, MO
    Posts
    135

    Default Re: Shoring up an old foundation wall

    Robert,

    The CMU wall may not have been designed properly which would require the blocks to have reinforcing steel doweled into the concrete floor and all the voids in the CMU should be filled with concrete. In addition there probably should be some type of drainage system to capture any water between the two walls.

    Randy Mayo, P.E.
    Residential Engineering & Inspection Services
    http://www.rlmengineers.com

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