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			<title>Green Building Forum - BuildDesk U: how to add green roof build up?</title>
			<lastBuildDate>Wed, 16 Sep 2026 17:16:22 +0100</lastBuildDate>
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		<title>BuildDesk U: how to add green roof build up?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10243&amp;Focus=169283#Comment_169283</link>
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		<pubDate>Tue, 05 Mar 2013 21:06:45 +0000</pubDate>
		<author>Shevek</author>
		<description>
			<![CDATA[How should I add a green roof to the build-up of a flat roof in BuildDesk U?]]>
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	<item>
		<title>BuildDesk U: how to add green roof build up?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10243&amp;Focus=169291#Comment_169291</link>
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		<pubDate>Tue, 05 Mar 2013 22:20:25 +0000</pubDate>
		<author>Nick Parsons</author>
		<description>
			<![CDATA[Surely it depends on the roof build-up? Is it a warm roof? If it's a ventilated cold roof then it's outside the thermal sandwich.Is it deep or shallow? If it's a thin (sedum) mat the effect would be negligible.]]>
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	<item>
		<title>BuildDesk U: how to add green roof build up?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10243&amp;Focus=169298#Comment_169298</link>
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		<pubDate>Tue, 05 Mar 2013 22:49:14 +0000</pubDate>
		<author>Shevek</author>
		<description>
			<![CDATA[Warm, between 100-150 mm.]]>
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	<item>
		<title>BuildDesk U: how to add green roof build up?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10243&amp;Focus=169305#Comment_169305</link>
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		<pubDate>Wed, 06 Mar 2013 07:31:08 +0000</pubDate>
		<author>SteamyTea</author>
		<description>
			<![CDATA[All you need to do is work out the thermal properties of the mud when wet, the plants make no difference, got a video about 'grass growing' and all the thermal data on here somewhere.]]>
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	<item>
		<title>BuildDesk U: how to add green roof build up?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10243&amp;Focus=169381#Comment_169381</link>
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		<pubDate>Wed, 06 Mar 2013 21:05:39 +0000</pubDate>
		<author>Timber</author>
		<description>
			<![CDATA[Just put soil into to buildesk - lambda of around 2 I think. <br /><br />TBH depending on the thickness of soil, I doubt it will make any difference to the U-Value of the system.]]>
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	<item>
		<title>BuildDesk U: how to add green roof build up?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10243&amp;Focus=169414#Comment_169414</link>
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		<pubDate>Wed, 06 Mar 2013 23:11:30 +0000</pubDate>
		<author>Shevek</author>
		<description>
			<![CDATA[<blockquote ><cite >Posted By: Timber</cite>Just throw put soil into to buildesk - lambda of around 2 I think.<br /><br />TBH depending on the thickness of soil, I doubt it will make any difference to the U-Value of the system.</blockquote><br />Ta. True but I was wondering if it might effect the dew point.]]>
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		<title>BuildDesk U: how to add green roof build up?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10243&amp;Focus=169447#Comment_169447</link>
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		<pubDate>Thu, 07 Mar 2013 09:42:06 +0000</pubDate>
		<author>Timber</author>
		<description>
			<![CDATA[Unlikely to alter it much - assuming that there is a lot of insulation already in the roof. If that is the case, then the thermal resistance contribution from the soil is really small, and so the affect on dewpoint is equally small.]]>
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	<item>
		<title>BuildDesk U: how to add green roof build up?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10243&amp;Focus=169453#Comment_169453</link>
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		<pubDate>Thu, 07 Mar 2013 09:51:10 +0000</pubDate>
		<author>Shevek</author>
		<description>
			<![CDATA[In that case perhaps I'm better just to introduce a ventilated zone under the green roof and do away with any risk of interstitial condensation.]]>
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	<item>
		<title>BuildDesk U: how to add green roof build up?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10243&amp;Focus=169460#Comment_169460</link>
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		<pubDate>Thu, 07 Mar 2013 09:57:47 +0000</pubDate>
		<author>SteamyTea</author>
		<description>
			<![CDATA[I did some test 3 summers ago about how the temperatures where affected by different roof coverings, I think one was a ventilated gap.<br /><br /><a href="http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5643&page=1" target="_self" rel="nofollow">http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5643&page=1</a><br /><br />and the grass growing one:<br /><br /><a href="http://www.greenbuildingforum.co.uk/forum114/comments.php?DiscussionID=7304&page=1#Item_12" target="_self" rel="nofollow">http://www.greenbuildingforum.co.uk/forum114/comments.php?DiscussionID=7304&page=1#Item_12</a>]]>
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