Dear Conal:
And, if it's not to much to ask, what kind of tiles are you talking about?...
Are they manmade or are they natural stone?
You mention something about limestone, but it doesn't seem like you're saying that your tiles are in fact limestone…
No matter what, I'm afraid that no matter what your tiles are mode of, they're not appropriate for outdoor installations.
Ciao and good luck,
Article ID: 573
Created On: Mon, Oct 1, 2007 at 2:06 PM
Last Updated On: Mon, Oct 1, 2007 at 12:00 AM
Authored by: Maurizio Bertoli [mail@mbstone.com]
Online URL: https://marblecleaning.org/knowledgebase/article.php?id=573