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			<title>Green Building Forum - What thickness insulation for cold water pipes to avoid condensation?</title>
			<lastBuildDate>Sat, 30 May 2026 23:17:27 +0100</lastBuildDate>
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		<title>What thickness insulation for cold water pipes to avoid condensation?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12189&amp;Focus=203473#Comment_203473</link>
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		<pubDate>Mon, 09 Jun 2014 22:29:35 +0100</pubDate>
		<author>aa44</author>
		<description>
			<![CDATA[I am starting to plan the plumbing for our new house.  I know that for the hot water pipes I need to put as much insulation on as possible but, for the cold water pipes, the issue is more about stopping condensation on the pipes.  I will probably be using something like Climaflex for the pipe insulation.  Can anybody give me any guidance on what thickness of insulation I would need on a 15mm plastic pipe to avoid condensation.  (Assuming pipes running through heated enevelope of airtight, mechanically ventilated house.)<br /><br />Thanks<br />AA]]>
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		<title>What thickness insulation for cold water pipes to avoid condensation?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12189&amp;Focus=203480#Comment_203480</link>
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		<pubDate>Mon, 09 Jun 2014 23:15:25 +0100</pubDate>
		<author>tony</author>
		<description>
			<![CDATA[Why must you insulate the hot pipes?<br /><br />All that will leak out anyway, simply a matter of time.<br /><br />Cold pipes are a problem, will you have a cold store in the loft?<br /><br />Plastic pipes might be a good choice, 15mm of insulation would be best and vapour closed with taped joins.]]>
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		<title>What thickness insulation for cold water pipes to avoid condensation?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12189&amp;Focus=203485#Comment_203485</link>
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		<pubDate>Tue, 10 Jun 2014 07:37:11 +0100</pubDate>
		<author>aa44</author>
		<description>
			<![CDATA[Hi Tony, It will be an unvented system, so no tank in the loft.  I wasn't going to insulate any of the heating pipes, but I was assuming that I would get a more constant hot water supply out of the taps (after the initial wait), if I insulated the hot water pipes (e.g. repeated use of the hot tap at the kitchen sink).]]>
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	<item>
		<title>What thickness insulation for cold water pipes to avoid condensation?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12189&amp;Focus=203486#Comment_203486</link>
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		<pubDate>Tue, 10 Jun 2014 07:57:16 +0100</pubDate>
		<author>aa44</author>
		<description>
			<![CDATA[Just to add that frost protection isn't an issue.  All the pipes are within the heated envelope and, being right by the sea, on an island, -2 is about as cold as it gets.  Even if the house had no heat for days on end, it wouldn't get cold enough to freeze the pipes.]]>
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		<title>What thickness insulation for cold water pipes to avoid condensation?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12189&amp;Focus=203493#Comment_203493</link>
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		<pubDate>Tue, 10 Jun 2014 09:41:23 +0100</pubDate>
		<author>jamesingram</author>
		<description>
			<![CDATA[I think there is some value in insulating HW pipes along well used short runs (definately necessary close to tank area) But more so in using smaller bore pipe were a lower flow rate is sufficient and designing run to be as short as possible. Check out the AECB water standards for some guidance of flow rates etc.]]>
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