<?xml version="1.0" encoding="UTF-8" standalone="no"?><table-reference graph="None" id="_823b259b-3ff5-4ff2-8b24-706d1928f01f"><num>S36C2k</num><title id="_ff6cc2db-6e4b-403c-b863-b5d0c02ae459">Typical R-Values for roof spaces with a reflective surface: Roof space &gt; 300 mm thick or pitched roof with a horizontal ceiling</title><table id="_685c013b-8359-4748-acf9-826c981f2f94" keycol="1"><tgroup cols="3"><colspec colname="002" colnum="1" colwidth="214.90*"/><colspec colname="003" colnum="2" colwidth="108.80*"/><colspec colname="004" colnum="3" colwidth="108.35*"/><thead><row><entry morerows="1">Direction of heat flow</entry><entry nameend="004" namest="003"><xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1420_0.4.0.xml#_e5acb40f-3d3d-4a3d-8987-f09f7eaadf77" id="_50727154-a3a3-40ed-8ee6-da4ebc2bc514" scope="local" type="abcb-glossentry">R-Value</xref> of reflective airspace </entry></row><row><entry>Ventilated roof space</entry><entry>Non-ventilated roof space</entry></row></thead><tbody><row><entry>Up</entry><entry>0.34</entry><entry>0.56</entry></row><row><entry>Down </entry><entry>1.36</entry><entry>1.09</entry></row></tbody></tgroup></table><desc-note id="_4df38f4d-9929-40ed-8cd7-96cdd18193ac"><ol outputclass="numbered"><li id="_b6eeb503-cfb7-4f4c-bd8e-0910f71f06ec">A non-ventilated airspace in a roof is one with continuous cover, such as metal or sarked tiles, and no specific provision for ventilation.</li><li id="_41f55cc0-8ad1-4516-af5c-c66393d69bdd">A reflective surface is a surface with normal emittance of 0.05 or less, in accordance with AS 4200.1.</li></ol></desc-note></table-reference>