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Recent content by mnmavic

  1. mnmavic

    Concrete Slab Unbonded Overlay

    This repair will be fully covered by the contractor. The bolts used for lifting the garage will be left in place during the pour and will become the new bottom plate anchors. Thanks much for your replys!
  2. mnmavic

    Concrete Slab Unbonded Overlay

    Thanks for the replies. I guess my biggest question is the ability of the new unbonded 4” slab to support the weight of the walls. The slab will extend over the entire surface of the original slab including the 12” thickened edge footer. Thus the walls will now sit on a 4” slab unbonded to an...
  3. mnmavic

    Concrete Slab Unbonded Overlay

    The building must be jacked up so the overlay covers the entire bottom slab, that way the building height is raised uniformly and it will not affect the height of the door openings.
  4. mnmavic

    Concrete Slab Unbonded Overlay

    Concrete blisters are a surface defect caused by too much air in the mix, or improper finishing of the concrete. They appear as small raised areas on the surface of the concrete that eventually break open under load. They are similar to spalling or chipping of the surface.
  5. mnmavic

    Concrete Slab Unbonded Overlay

    Hi everyone, I have a 5" monolithic slab with 12" thickened edges which was poured last fall. This spring, we built a 28'x32' garage on the slab. After the building was completed, tragically blisters were found to exist on the slab and began to break open. The concrete contractor has offered...

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