your next step would be to check it for salts. If you remember in class I showed you how to test for the presences of salts using a moisture meter and filter paper. The procedure is also on the blog at stp site. Test it for salts and your next step  would be to eliminate the salts if possible. Keep in mind that if this is a moisture issue due to environmental issues replacement may be the only alternative, but this time a different setting method may be necessary.<br>
<br><div class="gmail_quote">On Sun, Jan 9, 2011 at 1:47 PM, Fred Hueston <span dir="ltr">&lt;<a target="_top" href="mailto:fhueston@gmail.com">fhueston@gmail.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div class="im">Roger<div><br></div><div>Pitting and spalling can be caused by basically two things..The crystallization of soluble salts and/or extreme heat. I would first look to see how the granite is set. If it is set in a mortar that is getting wet it can be caused by salts in the setting bed. I would also look at external salt sources. ie, cleaners, deicing salts, etc.</div>

<div><br></div></div><div><br><br><div class="gmail_quote"><div class="im">On Sun, Jan 9, 2011 at 1:43 PM, Roger Konarski <span dir="ltr">&lt;<a target="_top" href="mailto:qm144@yahoo.com" target="_blank">qm144@yahoo.com</a>&gt;</span> wrote:<br>
</div><div><div></div><div class="h5"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<table cellspacing="0" cellpadding="0" border="0"><tbody><tr><td valign="top" style="font:inherit"><p style="margin:0in 0in 10pt" class="MsoNormal"><font size="3" face="Calibri">I would appreciate help on this problem. See attached pictures. New installation of outdoor granite. They are having problems with the stone pitting in certain areas. What is causing this and what if anything can be done to prevent this from continuing? <span> </span>Thanks in advance for your help!</font></p>

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</blockquote></div></div></div><br><br clear="all"><div class="im"><br>-- <br>Frederick M. Hueston PhD<br><a target="_top" href="http://www.stoneforensics.com" target="_blank">www.stoneforensics.com</a><br><a target="_top" href="http://www.stoneandtilepros.com" target="_blank">www.stoneandtilepros.com</a><br>

Recommended stone care products  <a target="_top" href="http://www.stonecarecentral.com/?Click=2149" target="_blank">http://www.stonecarecentral.com/?Click=2149</a><br><br>Many of my informational articles can be found at <a target="_top" href="http://www.thestonedude.blogspot.com" target="_blank">www.</a><a target="_top" href="http://stoneandtilepros.com" target="_blank">stoneandtilepros.com</a><div>

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</div></div></blockquote></div><br><br clear="all"><br>-- <br>Frederick M. Hueston PhD<br><a target="_top" href="http://www.stoneforensics.com" target="_blank">www.stoneforensics.com</a><br><a target="_top" href="http://www.stoneandtilepros.com" target="_blank">www.stoneandtilepros.com</a><br>
Recommended stone care products  <a target="_top" href="http://www.stonecarecentral.com/?Click=2149" target="_blank">http://www.stonecarecentral.com/?Click=2149</a><br><br>Many of my informational articles can be found at <a target="_top" href="http://www.thestonedude.blogspot.com" target="_blank">www.</a><a target="_top" href="http://stoneandtilepros.com" target="_blank">stoneandtilepros.com</a><div>
<br>Listen to my radio show at <a target="_top" href="http://www.blogtalkradio.com/drfred" target="_blank">www.blogtalkradio.com/drfred</a><div><a target="_top" href="http://www.blogtalkradio.com/drfred" target="_blank"></a>The Ultimate Stain Remover  <a target="_top" href="http://www.GoDrFred.com" target="_blank">www.GoDrFred.com</a></div>
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