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Recurrent cracks in brick wall

This topic contains 4 replies, has 3 voices, and was last updated by  kurt@welkerhomes.com 1 week, 6 days ago.

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  • #726458

    There are recurrent cracks in the brick wall shown in the image. The cracks have been repaired before but keep reappearing in the same location under the windows.
    I suspect this is because the wall requires expansion joints. Is this a valid assumption? If yes where should the joints be placed?

    The wall has a length of around 40 feet, is south facing, and has a mortar filled vertical joint on the right hand side corner as seen from image. Would cutting that existing joint open and making it an expansion joint be enough to possibly solve the cracking problem under the windows?

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    #726465

    kurt@welkerhomes.com
    Pro
    Owatonna, MN - Minnesota

    I would say the problem is the lack of a control joint. The stacked windows five the wall a weak point where it can “pull apart”. Cutting an existing joint and the brick in the adjoining course between the windows and the window and the base of the wall should work, then could patch the crack. there is n guarantee as the crack is there and it is a weak spot now.

    #726466

    Could it also be a weak lintel?

    #726482

    Sorpa
    Pro
    Pierrefonds, Qc

    Could it also be a weak lintel?

    How do you define a weak lintel?
    Which lintel are you talking about?

    #726573

    kurt@welkerhomes.com
    Pro
    Owatonna, MN - Minnesota

    Could it also be a weak lintel?

    I would say that the crack is more indicative of a shrinkage crack that a sagging lintel. If the lintel were weak and sagging, you would typically see step cracks going up from each corner to the center of the window, creating a triangle pattern. The single crack as shown in the photo is more of a sign of a missing control / expansion joint.

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