https://www.designingbuildings.co.uk/w/index.php?action=history&feed=atom&title=Vapour_pressure 2026-06-07T04:45:40Z Revision history for this page on the wiki MediaWiki 1.17.4 https://www.designingbuildings.co.uk/w/index.php?title=Vapour_pressure&diff=300301&oldid=prev 2025-04-10T10:35:12Z

<p></p> <table style="background-color: white; color:black;"> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 10:35, 10 April 2025</td> </tr><tr><td colspan="2" class="diff-lineno">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class='diff-marker'>&minus;</td><td style="background: #ffa; color:black; font-size: smaller;"><div>Course Handbook: Level 3 Award in Energy Efficiency Measures for Older and Traditional Buildings, published by Historic England in December 2024, defines vapour pressure as: 'The pressure exerted by molecules of water vapour in gas form. This can exert considerable force — for example, enough to blister paint. Warm, moist air has a higher pressure than cold, dry air. A high moisture content will create a large amount of vapour pressure. Vapour diffuses through building materials at a rate proportional to the vapour pressure difference. If one side of a wall is much dryer than the other, the vapour will diffuse faster.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>Course Handbook: Level 3 Award in Energy Efficiency Measures for Older and Traditional Buildings, published by Historic England in December 2024, defines vapour pressure as: 'The pressure exerted by molecules of water vapour in gas form. This can exert considerable force — for example, enough to blister paint. Warm, moist air has a higher pressure than cold, dry air. A high moisture content will create a large amount of vapour pressure. Vapour diffuses through building materials at a rate proportional to the vapour pressure difference. If one side of a wall is much dryer than the other, the vapour will diffuse faster.<ins class="diffchange diffchange-inline">'</ins></div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>See also Saturation vapour pressure</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>See also Saturation vapour pressure</div></td></tr> </table>

Designing Buildings https://www.designingbuildings.co.uk/w/index.php?title=Vapour_pressure&diff=300300&oldid=prev 2025-04-10T10:34:54Z

<p>Created page with &quot;Course Handbook: Level 3 Award in Energy Efficiency Measures for Older and Traditional Buildings, published by Historic England in December 2024, defines vapour pressure as: &#039;The...&quot;</p> <p><b>New page</b></p><div>Course Handbook: Level 3 Award in Energy Efficiency Measures for Older and Traditional Buildings, published by Historic England in December 2024, defines vapour pressure as: 'The pressure exerted by molecules of water vapour in gas form. This can exert considerable force — for example, enough to blister paint. Warm, moist air has a higher pressure than cold, dry air. A high moisture content will create a large amount of vapour pressure. Vapour diffuses through building materials at a rate proportional to the vapour pressure difference. If one side of a wall is much dryer than the other, the vapour will diffuse faster.<br /> <br /> See also Saturation vapour pressure<br /> <br /> = Related articles on Designing Buildings =<br /> <br /> * Capillary action.<br /> * Humidity.<br /> * Hygroscopic.<br /> * Hygroscopicity.<br /> * Interstitial condensation.<br /> * Moisture.<br /> * Moisture movement.<br /> * Penetrating damp.<br /> * Rising damp.<br /> * Saturation vapour pressure.<br /> * Vapour barrier.<br /> * Vapour permeability.<br /> * Water.<br /> * Wetting diffusivity.<br /> <br /> [[Category:DCN_Definition]] [[Category:Definitions]] [[Category:Standards_/_measurements]]</div>

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