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<body><div>So, like, AA-man;</div><div><br></div><div>Clearly the universe desires to conceal anything having to do with the letter "R" from you (noting the "R" that is missing from "No(r)bert's" name and in the "A(r)chitecture and Education " in your sigfile and the R-value of gravel in your search engine's capabilities and in your tattered copy of something-or-t'other.</div><div><br></div><div>I just happened to have an inch-pound version of the 1985 ASHRAE Handbook of Fundamentals in my hand and in 23.8 Table 3A, for "Sand and gravel or stone aggregate of 140 pcf density" it lists its thermal resistivity (ie R-value per inch thickness) as being:</div><div><br></div><div> (oven dried) 0.11 and (not dried) 0.08 in units of h*ft^2*degF/Btu</div><div><br></div><div>To convert from Murrican units to SIU, mulitply by 6.934 to convert to
m*degC/W
(reduced from ( m^2 * degC) / (W*m) )</div><div><br></div><div> </div><div>Me ? I'd be inclined to take maybe 18" of that 24" of crushed stone and bring it inside of the thermal envelope where one can take advantage of its thermal mass. It'd only increase the load on top of the foam by less than 1.5 psi ... peanuts eh ?</div><div><br></div><div><br></div><div>On Mon, 07 Dec 2015 19:02:15 -0500, Alan Abrams <alan@abramsdesignbuild.com> wrote:<br></div><br><blockquote style="margin: 0 0 0.80ex; border-left: #0000FF 2px solid; padding-left: 1ex"><div dir="ltr">Nobert--<div><br></div><div>my "look-up" skills may admittedly be deficient, but I could not find </div></div></blockquote><div><br></div><blockquote style="margin: 0 0 0.80ex; border-left: #0000FF 2px solid; padding-left: 1ex"><div dir="ltr"><div><font style="color:rgb(102,102,102)" size="1"><font size="2"><br style="color:rgb(102,102,102)"></font></font><a href="http://www.heliconworks.com/index2.html" target="_blank">HELICON WORKS <i>Achitecture and Education</i></a></div></div><div class="gmail_extra">
<br><div class="gmail_quote">On Mon, Dec 7, 2015 at 5:26 PM, Norbert Senf <span dir="ltr"><<a href="mailto:norbert.senf@gmail.com" target="_blank">norbert.senf@gmail.com</a>></span> wrote:R-value of gravel is a look-up value............N<br></div><br></div>
</blockquote><br><br><br><div id="M2Signature"><div>-- </div><div>=== * ===<br>Rob Tom T6015O<br>Kanata, Ontario, Canada<br><br>< A r c h i L o g i c at Y a h o o dot C a ><br><br>(manually winnow the chaff from my edress if you hit "Reply")</div></div></body></html>