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--></style></head><body lang="EN-US" link="blue" vlink="purple"><div class="WordSection1"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060">Here’s one good set of tables to start with – you’ll find google is your friend to look up specific material/product properties. </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060"><a href="http://www.uncg.edu/iar/elight/learn/determine/lc_sub/mat_prop.html">http://www.uncg.edu/iar/elight/learn/determine/lc_sub/mat_prop.html</a></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060">As a general rule, I was taught for photometrics it’s safe/conservative when actual finishes aren’t known to start with reflectances of 80-50-20 for ceiling, wall, and floor surfaces respectively. That’s representative of typical white ceilings/tile, walls of light-to-medium colors, and dark carpet/flooring. </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060">Colored/textured surfaces can be tricky to estimate. Sometimes it’s helpful to switch an image or swatch of the color/pattern to grayscale to help estimate where on a scale of 0 to 1 the reflectance value should lie. </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060">It’s also helpful to be aware of some real-world examples to set boundaries: </span></p><p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman""> </span></span></span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060">Fresh asphalt situates around 5% reflectance (0.05)</span></p><p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman""> </span></span></span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060">Freshly fallen snow reflectance is around 90% (0.90)</span></p><p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman""> </span></span></span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060">Most common building materials and finishes should situate between those extremes</span></p><p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman""> </span></span></span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060">White suspended ceiling tiles in particular can range from ~75 to 90% reflectance, with higher values typically costing a premium. Reflectance is commonly stated on spec sheets and sometimes in architectural specifications (that goes for most commercial paints as well).</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060">I hope that helps!</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060">~Nick</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060"> </span></p><div><p class="MsoNormal"><b><span style="font-size:14.0pt;font-family:"Calibri",sans-serif;color:#002060">NICK CATON, P.E.</span></b><span style="font-size:11.0pt;font-family:"Verdana",sans-serif;color:#1f497d"><br></span><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#561782">Owner</span></b></p><p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#561782"> </span></b></p><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#561782">Caton Energy Consulting</span></b><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:black"><br></span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> 306 N Ferrel</span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> Olathe, KS 66061</span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> office: 785.410.3317</span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#561782"><a href="www.catonenergy.com"><span style="color:#561782">www.catonenergy.com</span></a></span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060"></span></p></div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060"> </span></p><div><div style="border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in 0in 0in"><p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Bldg-sim [mailto:<a href="mailto:bldg-sim-bounces@lists.onebuilding.org">bldg-sim-bounces@lists.onebuilding.org</a>] <b>On Behalf Of </b>Jones, Christopher<br><b>Sent:</b> Thursday, September 17, 2015 2:50 PM<br><b>To:</b> <a href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br><b>Subject:</b> [Bldg-sim] Radiance Materials database</span></p></div></div><p class="MsoNormal"> </p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d">I am looking for some example materials I can use in a Radiance simulation for daylighting calculations for LEED v4. The project is your typical open office concept with half-height partitions between work stations.</span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d">The partitions are a white, translucent material. The workstations are a wood grain laminate, the walls are flat off-white, the carpet tiles are a blue-gray color. I can get the colors from photographs of the materials but I am not sure how to estimate the reflectance. Also, I am not sure of how to handle the texture of the carpet tiles. </span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d">Thanks for any assistance!</span></p><div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><img border="0" width="108" height="43" id="Picture_x0020_2" src="cid:image001.png@01D0F21D.D0C10B30" alt="cid:image003.png@01D09C46.E75BA0D0"></span><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1c467a"></span></b></p><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1c467a">Christopher Jones,</span></b><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d"> </span></b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d">P.Eng.<i> <br></i></span><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d">Senior Engineer<b></b></span></p><p class="MsoNormal"><b><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d"> </span></b></p><p class="MsoNormal"><b><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d">WSP Canada Inc.</span></b></p><p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d">2300 Yonge Street, Suite 2300</span></p><p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d">Toronto, ON M4P 1E4</span><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#595959"><br></span><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d">T +1 416-644-4226</span></p><p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d">F +1 416-487-9766</span></p><p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d">C +1 416-697-0056</span></p><p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d"> </span></p><p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d"><a href="http://www.wspgroup.com/">www.wspgroup.com</a> </span><i><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#565656"></span></i></p></div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d"> </span></p><div class="MsoNormal" align="center" style="text-align:center"><hr size="2" width="100%" align="center"></div><div><p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:gray"><br>You are receiving this communication because you are listed as a current WSP contact. 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If you have received this communication in error, please notify the sender, and destroy and delete any copies you may have received. <br><br>WSP provides professional land surveying services through the following entities: WSP Surveys (AB) Limited Partnership and WSP Surveys (BC) Limited Partnership </span></p></div></div></body></html>