I have a cinder block foundation, and near the floor in my garage the parging has flaked off excessively, revealing cinder blocks with a poor surface.

My thought is to clean off any remaining parging that's flaky, clean the cinder blocks with a wire brush and apply mortar in any cracks and to the surface of the blocks.

From these pictures, would that be a valid solution, or must something else be done to repair the blocks?

Also, our (electric) dryer vents into the garage, which is why I assume the cinder blocks are in such poor shape compared to the rest of the house, but other potential causes may be good to know too.

Interior wall Interior wall overview Interior wall detail

Exterior wall Exterior wall overview

  • I don't know enough, but some of those blocks seem to be quite rough looking, even if they are cinder blocks and not concrete/cement blocks. Something to check before covering it over.
    – crip659
    Commented May 16, 2023 at 15:16

1 Answer 1


Use surface bonding cement rather than plain mortar and your parging will do a bit more for you at basically the same cost and effort.

Your wall shows water (and freezing/spalling) damage. That probably is being aggravated by improperly venting dryer moisture into the garage, rather than outside, so you should correct that.

  • Thanks, this looks like good advice, I'm also looking to fix up the dryer vent as I'm fairly confident that's the root of my problem.
    – Matthew
    Commented May 17, 2023 at 13:48

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