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Mortar for Sandstone block foundation

951 Views 1 Reply 2 Participants Last post by  Windows on Wash
The mortar in my sandstone foundation needs re pointing. From what I have read, modern mortar is too strong and can risk cracking the stone. Any advice on proper mortar I should use? I have read about lime mortar, but see conflicting reports on using hydrated masons lime versus fired slake lime? Can't find it anywhere.
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There is no thing such as "modern mortar" as far as I know. Mortars can be adjusted for strength so that they are not stronger than the block or stone. You are correct that a mortar that is too hard will create issues for the wall in other ways.

Have you found a mason to work with? There are ways to test the wall and mortar and properly match them.

I am not a mason but one of these guys on here should know and point you in the right direction.
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