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<p><font face="Verdana">Back to the orig<font face="Verdana">inal
post<font face="Verdana">. A commer<font face="Verdana">cial
sy<font face="Verdana">stem doesn't mean they used pa<font
face="Verdana">ving block<font face="Verdana">s. I
have seen many tha<font face="Verdana">t did not. </font>Fly
as<font face="Verdana">h is al<font face="Verdana">so
a product of coal combu<font face="Verdana">stion
that can be use<font face="Verdana">d to make
a stronger concrete, though it wo<font
face="Verdana">n't <font face="Verdana">necessarily
h<font face="Verdana">elp <font
face="Verdana">in this case, as it <font
face="Verdana">is lighter. </font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font><br>
</p>
<br>
<div class="moz-cite-prefix">On 6/30/2018 7:05 PM, Ken Schaal wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAEd52_N-Zsmio-NVvoKUGidms70nwhhXM-tF+8Ckq_M=OdjCsA@mail.gmail.com">
<div dir="auto">Regular cement blocks absorb water, freeze thaw
cycle destroys them.
<div dir="auto"><br>
</div>
<div dir="auto">Paving blocks are made with silica fume, denser
than cement,dont absorb water, don't suffer freeze thaw
damage. They are designed for walkways and driveways.</div>
<div dir="auto">There are cement looking pavers , 12x12 x 2"
,also made with fume.</div>
<div dir="auto">Any block plant should be able to make balast
blocks to the needed specs. Silica fume is a waste product of
coal combustion </div>
<div dir="auto">..ie cheap, but effective. </div>
<div dir="auto">Ken schaal </div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Jun 30, 2018 6:29 PM, "cwarfel" <<a
href="mailto:cwarfel@entech-engineering.com"
moz-do-not-send="true">cwarfel@entech-engineering.com</a>>
wrote:<br type="attribution">
<blockquote class="quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
<p><font face="Verdana">I am <font face="Verdana">pretty
sure it is the freeze<font face="Verdana">-tha<font
face="Verdana">w <font face="Verdana">cycle
that the blocks are exposed to. I have
inspected hundreds of sys<font face="Verdana">tem
in the Nor<font face="Verdana">theas<font
face="Verdana">t and this is a recurring<font
face="Verdana"><font face="Verdana">
problem. It has to b<font
face="Verdana">e part of the
maintenance protocols or there
will be insufficient we<font
face="Verdana">i<font
face="Verdana">ght to resist
the<font face="Verdana"> wind
uplift forces. C<font
face="Verdana">hris</font></font></font></font></font></font></font></font></font></font></font></font></font></font></font><br>
</p>
<div class="elided-text"> <br>
<div class="m_-6891022373104447490moz-cite-prefix">On
6/30/2018 6:17 PM, Chris Schaefer wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Kirk,
<div><br>
</div>
<div>Had the same thing happen to me on a commercial
ballasted system installed back in 2004. Had to be
moved around to allow installation of a new roof
system. Replaced all the ballast in 2017. I'm
located in Western NY, thus the same weather you
see. The blocks were on a stainless steel pan of
which the array was attached to. I've plenty of
ideas as to why they broke down but no real
evidence. I expect it to happen again. Does make
me wonder about the new ballast systems that still
call out for the blocks as ballast. Perhaps poly
sand bags?</div>
<div><br>
</div>
<div>Christopher</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Wed, Jun 27, 2018 at
4:20 PM, Kirk Herander <span dir="ltr"><<a
href="mailto:vtsolar@icloud.com"
target="_blank" moz-do-not-send="true">vtsolar@icloud.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0
0 .8ex;border-left:1px #ccc
solid;padding-left:1ex">
<div link="blue" vlink="purple" lang="EN-US">
<div
class="m_-6891022373104447490m_-3312019715009331861WordSection1">
<p class="MsoNormal"><span
style="font-size:14.0pt">All,</span></p>
<p class="MsoNormal"><span
style="font-size:14.0pt">I have a 6 year
old ballasted roof system in which about
50% of the solid cap blocks(16\u201dL x 8\u201dw x
4\u201dD) are cracked and crumbing, some are
close to rubble. I assume it was a bad
batch, but has anyone seen this before?
What might be the preventive remedy in
the future? A coating of some sort?</span></p>
<p class="MsoNormal"><span
style="font-size:14.0pt"> </span></p>
<p class="MsoNormal"><b><span
style="font-size:12.0pt">Kirk Herander</span></b></p>
<p class="MsoNormal"><b><span
style="font-size:12.0pt">Owner|Principal,
VT Solar, LLC </span></b></p>
<p class="MsoNormal"><b><i><span
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style="color:blue">www.vermontsolarnow.com</span></a></span></b></p>
<p class="MsoNormal"><span
style="font-size:12.0pt">dba Vermont
Solar Engineering</span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt">NABCEP<sup>TM
</sup>2003 Inaugural Certificant</span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt">VT RE Incentive
Program Partner</span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt">802.863.1202</span></p>
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style="font-size:14.0pt"> </span></p>
<p class="MsoNormal"><span
style="font-size:14.0pt"> </span></p>
<p class="MsoNormal"><span
style="font-size:14.0pt"> </span></p>
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