<?xml version="1.0" encoding="UTF-8" standalone="no"?><table-reference graph="None" id="_adcf4e1d-853e-42fe-af93-de0380bebb1f"><num>S36C2l</num><title id="_ca86f7f7-f668-4d0d-90b7-fa298e1631b2">Typical R-Values for non-ventilated roof spaces with a reflective surface: Flat, skillion or pitched roof (≤5°) with horizontal ceiling, roof space not more than 300 mm thick</title><table id="_79c30118-cff6-46ce-b013-dcc7b21f072c" keycol="1"><tgroup cols="4"><colspec colname="001" colnum="1" colwidth="108.15*"/><colspec colname="004" colnum="2" colwidth="107.95*"/><colspec colname="002" colnum="3" colwidth="107.95*"/><colspec colname="003" colnum="4" colwidth="107.95*"/><thead><row><entry>Emittance of airspace bounding surfaces</entry><entry>Thickness of roof space</entry><entry>Direction of heat flow</entry><entry><xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1420_0.4.0.xml#_e5acb40f-3d3d-4a3d-8987-f09f7eaadf77" id="_d9eb3fde-7e41-4a83-a9e4-855a45caae94" scope="local" type="abcb-glossentry">R-Value</xref> of reflective airspace</entry></row></thead><tbody><row><entry>Surface 1 emittance 0.9, Surface 2 emittance 0.05</entry><entry>≤ 300 mm</entry><entry>Up</entry><entry>0.43</entry></row><row><entry>Surface 1 emittance 0.9, Surface 2 emittance 0.05</entry><entry>20 mm</entry><entry>Down</entry><entry>0.60</entry></row><row><entry>Surface 1 emittance 0.9, Surface 2 emittance 0.05</entry><entry>60 mm</entry><entry>Down</entry><entry>1.16</entry></row><row><entry>Surface 1 emittance 0.9, Surface 2 emittance 0.05</entry><entry>100 mm to ≤ 300 mm</entry><entry>Down</entry><entry>1.30</entry></row></tbody></tgroup></table><desc-note id="Table Notes"><ol outputclass="numbered"><li id="_6244f552-15f3-41b0-ba6c-a2f39d436ed8">A non-ventilated airspace in a roof is one with continuous cover, such as metal, and no specific provision for ventilation.</li><li id="_e0b57374-1417-4e44-ac46-6b765f599d00">Linear interpolation may be used to calculate the <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1420_0.4.0.xml#_e5acb40f-3d3d-4a3d-8987-f09f7eaadf77" id="_7b50a387-6683-4856-abd9-ae7f4d7a0326" referencetype="Text" scope="local" synctargettext="false" type="abcb-glossentry">R-Value</xref> of an airspace of intermediate thickness.</li><li id="_34be8295-1243-4013-85ca-738977cebbe4"><xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1420_0.4.0.xml#_f438bdfd-6adb-43c4-b342-7b1656af23c4" id="_3ebc4bee-8ad2-40b6-a7f6-c2626ab92d01" referencetype="Text" scope="local" synctargettext="false" type="glossterm">R-Values</xref> are calculated using AS/NZS 4859.2 based on the following:<ol><li id="_c42553ac-148e-4fa3-9bf1-238593eb2b77">summer temperatures of 24°C internally and 36°C externally for heat transfer down; and</li><li>winter temperatures of 18°C internally and 12°C externally for heat transfer up; and</li><li>emittances are normal emittances of bounding surfaces in accordance with AS 4200.1.</li></ol></li></ol></desc-note></table-reference>