<?xml version="1.0" encoding="UTF-8" standalone="no"?><?Xpress productLine="ncc-clause" ?><clause id="_a60167f2-667a-4e7e-8d56-10297d1a6c81" outputclass="ncc-clause"><meta><facet building="Class 2"/><facet building="Class 3"/><facet building="Class 4"/><facet building="Class 5"/><facet building="Class 6"/><facet building="Class 7a"/><facet building="Class 7b"/><facet building="Class 8"/><facet building="Class 9a"/><facet building="Class 9b"/><facet building="Class 9c"/><facet building="Class 10b"/><facet climate="Climate zone 8"/></meta><sptc>4.2.8</sptc><title id="_5557889c-a9bb-4966-8886-36139011de15">Vapour barriers</title><archive-num>2019: 3.2.2.6</archive-num><clause-variation href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/4574_0.8.0.xml" variation="NSW" variation-type="REPLACE">NSW REPLACE Clause</clause-variation><clause-variation href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/4575_0.3.0.xml" variation="SA" variation-type="REPLACE">SA REPLACE Clause</clause-variation><subclause id="_09b10674-345f-405f-a394-3041a53896cd" outputclass="subclause"><title id="_1b0130b7-c5d2-4035-b7f9-94d75881591e">SubClause</title><num>1</num><p>A vapour barrier must be installed under slab-on-ground construction for a Class 1 building and for a Class 10 building where the slab is continuous with the slab of a Class 1 building in accordance with (2), (3), (4) and (5).</p></subclause><subclause id="_e5d1071a-3ec6-45cb-b48d-f57fd858f883" outputclass="subclause"><title id="_92b53d7a-c586-49ee-9f51-cbb7ebe4b925">SubClause</title><num>2</num><p>Materials: A vapour barrier must be—</p><ol outputclass="alpha"><li id="_fe5a4a74-f041-4d89-bdbc-44efda64248e">0.2 mm nominal thickness polyethylene film; and</li><li id="_ab51b499-9da8-432a-adbd-521c32720220">medium impact resistant,</li></ol><p>determined in accordance with criteria specified in clause 5.3.3.3 of AS 2870.</p></subclause><subclause id="_b7161e4b-9262-4ff7-8ac1-9ab4aaf44a3a" outputclass="subclause"><title id="_6f9e5bc1-767f-447a-a7d0-90464bf7cffd">SubClause</title><num>3</num><p>A vapour barrier must be branded continuously “AS 2870 Concrete underlay, 0.2 mm Medium impact resistance”.</p></subclause><subclause id="_36d9069b-ef32-4fb3-b581-559ea3671f3d" outputclass="subclause"><title id="_129aba62-e094-47b8-b8a4-5ebf5187eae9">SubClause</title><num>4</num><p>Installation: A vapour barrier must be installed as follows:</p><ol outputclass="alpha"><li id="_941dde96-4811-4449-bd73-cabc4757e834">Lap not less than 200 mm at all joints.</li><li id="_cf9ff2af-67a0-49e9-b4a6-0b38a48b0aad">Tape or seal with a close-fitting sleeve around all service penetrations.</li><li id="_9b53abfd-c5c5-425f-a51a-570d552bd162">Fully seal where punctured (unless for service penetrations) with additional polyethylene film and tape.</li></ol></subclause><subclause id="_09bac608-bec8-4757-9972-4cf5d4268e4b" outputclass="subclause"><title id="_74120192-1a04-414f-9137-ae3e236c5201">SubClause</title><num>5</num><p>The vapour barrier must be placed beneath the slab so that the bottom surface of the slab is entirely underlaid and must extend under internal and edge beams to finish at ground level in accordance with <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/542_0.19.0.xml#_5b6e2b34-e6aa-4e69-a758-12f28e103099" id="_63d3cb6b-29c9-431a-8363-4aa5811d5283" referencetype="Text" scope="local" synctargettext="false" type="image-reference">Figure 4.2.8</xref>.</p></subclause><image-reference conref="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/542_0.19.0.xml" id="_5b6e2b34-e6aa-4e69-a758-12f28e103099"><num xmlns:inv="urn:xpressauthor:xpressdocument" inv:access="external">4.2.8</num><title xmlns:inv="urn:xpressauthor:xpressdocument" id="_dd0a2371-aa2b-45c9-9798-c4b7d7a33c84" inv:access="external">Acceptable vapour barrier and damp-proofing membrane location</title><image xmlns:inv="urn:xpressauthor:xpressdocument" href="ERROR_IN_RESOLVING_URI:4-2-8-acceptable-vapour-barrier-and-damp-proofing-membrane-location.eps" inv:access="external"/><desc-note xmlns:inv="urn:xpressauthor:xpressdocument" id="_2141524e-6523-4d70-b307-f173ae53be6d" inv:access="external"><p inv:access="external">All dimensions in millimetres.</p></desc-note></image-reference></clause>