Mike Lamb Posted May 22, 2020 Report Share Posted May 22, 2020 Would sealing the exterior of the limestone blocks slow deterioration? Or would block replacement be the best remedy? Quote Link to comment Share on other sites More sharing options...
Marc Posted May 22, 2020 Report Share Posted May 22, 2020 I'm curious about the efflorescence. Why does it seem to favor the border between the spalled and un-damaged areas? Quote Link to comment Share on other sites More sharing options...
Bill Kibbel Posted May 22, 2020 Report Share Posted May 22, 2020 If a lime mortar would have been used, the moisture in the wall would migrate out through the joints. Portland based mortar is forcing the moisture through the face of the stones. Sealing on the exterior would be useless. When the faces of the stones erode back about 1/2", they can be patched with Lithomex, which is lime-based. 1 Quote Link to comment Share on other sites More sharing options...
Jim Katen Posted May 23, 2020 Report Share Posted May 23, 2020 10 hours ago, Marc said: I'm curious about the efflorescence. Why does it seem to favor the border between the spalled and un-damaged areas? Just a guess, but I suspect that the worst of it occurs where the most water emerges. You can't see it because it's fallen off along with the face of the stone. Quote Link to comment Share on other sites More sharing options...
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