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cleaning masonry / limestone

Stone Conversations : Archive 10 : Message 00493

From: RPG <inittab@zzzzzzzz>
Date: Fri, 16 Dec 2005 10:05:47 -0500
Subject: cleaning masonry / limestone

Hello,

I'm writing in hopes of receiving feedback about methods that are safe
and effective for cleaning limestone masonry construction. My
limestone constructed home of 200+ years of age is in need of repointing
and as part of the process I want to clean the limestones with as little
damage as possible. The stones are stained and discolored with organic
material as well as portland cement. A previous home owner recklessly
used portland to fix a few of the masonry joints. I think some sort of
media blasting would probably work but I'm curious if anyone has some
specific ideas on this. TIA

Bob

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