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		<id>https://www.designingbuildings.co.uk/w/index.php?action=history&amp;feed=atom&amp;title=Y-value</id>
		<title>Y-value - Revision history</title>
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		<updated>2026-04-06T00:22:45Z</updated>
		<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://www.designingbuildings.co.uk/w/index.php?title=Y-value&amp;diff=236980&amp;oldid=prev</id>
		<title>Designing Buildings: Created page with &quot;[https://www.futurehomes.org.uk/guidance Part L 2021 Where to start, A guide for housebuilders and their advisors, Masonry construction], published by the Future Homes Hub in Jun...&quot;</title>
		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=Y-value&amp;diff=236980&amp;oldid=prev"/>
				<updated>2022-08-18T07:02:33Z</updated>
		
		<summary type="html">&lt;p&gt;Created page with &amp;quot;[https://www.futurehomes.org.uk/guidance Part L 2021 Where to start, A guide for housebuilders and their advisors, Masonry construction], published by the Future Homes Hub in Jun...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;[https://www.futurehomes.org.uk/guidance Part L 2021 Where to start, A guide for housebuilders and their advisors, Masonry construction], published by the Future Homes Hub in June 2022,defines Y-value as: ‘additional heat loss - averaged over the total heat loss area.’&lt;br /&gt;
&lt;br /&gt;
= Related articles on Designing Buildings =&lt;br /&gt;
&lt;br /&gt;
* Approved document L.&lt;br /&gt;
* Dwelling Emission Rate.&lt;br /&gt;
* Dwelling Fabric Energy Efficiency.&lt;br /&gt;
* Masonry.&lt;br /&gt;
* Standard Assessment Procedure.&lt;br /&gt;
* Target Fabric Energy Efficiency.&lt;br /&gt;
* Target CO2 emission rates.&lt;br /&gt;
* Target Primary Energy Rate.&lt;br /&gt;
* U value.&lt;br /&gt;
&lt;br /&gt;
[[Category:DCN_Definition]] [[Category:Definitions]] [[Category:Standards_/_measurements]]&lt;/div&gt;</summary>
		<author><name>Designing Buildings</name></author>	</entry>

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