I had a new wall put up consisting of octagon shaped blocks that you just lay down.
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Woodbridge Environmental Tiptophouse.com on Jul 19, 2012This sounds like efflorescence. If the blocks were made from cement the salts in the material used to make them is reacting to moisture. What happens is the moisture is dissolving the salts in the blocks allow it to flow in liquid stage until it reaches the outside of the block where the moisture evaporates away. The result is white deposits left behind. If you can post a photo of this perhaps I or someone else can confirm that. There is nothing you can do to stop this from occurring. If you come up with something that will, you will become quite rich. Sealing the top with clear water proofing sealer may slow down this process but in time it will begin again.Helpful Reply
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KMS Woodworks on Jul 20, 2012What is behind this wall?....was a liner or barrier used for moisture?Helpful Reply
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Barb M. on Jul 30, 2012Yes, there is a liner behind the wall.Helpful Reply
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Barb M. on Jul 30, 2012Thank you Woodbridge. I tried to remove them by scrubbing them but I probably made them worse.Helpful Reply
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KMS Woodworks on Jul 30, 2012Barb...here is an article that explains this a bit http://www.masonryinstitute.org/pdf/612.pdfHelpful Reply
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