Have to agree with you on the word waterproofing..The only way to waterproof the grout would be to paint it with a water proof sealer.  This will water proof it from the top down and not the bottom up. If you do water proof it Ill bet it starts falling apart within a year do to moisture from underneath. best bet would have been to caulk the joints.<br>
<br><div class="gmail_quote">On Wed, Jun 9, 2010 at 9:34 AM,  <span dir="ltr">&lt;<a target="_top" href="mailto:lorne@fabracleenstoneandtilecare.com">lorne@fabracleenstoneandtilecare.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Goodmorning all,<br>
I have a client, they are just finishing up building a home and asked if the outside grout could be waterproofed. This is the contractor... He said they already sealed it, it is 8 months old, and cementitious. I dont usually like those words &quot;waterproof&quot; but figured i&#39;d put it out there<br>

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