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			<title>Green Building Forum - 250mm wide wall cavity</title>
			<lastBuildDate>Fri, 01 May 2026 15:13:03 +0100</lastBuildDate>
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		<title>250mm wide wall cavity</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=829&amp;Focus=9672#Comment_9672</link>
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		<pubDate>Mon, 19 Nov 2007 23:26:52 +0000</pubDate>
		<author>tony</author>
		<description>
			<![CDATA[I thought that metal wall ties were not allowed under building regs since several years ago? Anyone know where to get polypropylene ones?]]>
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		<title>250mm wide wall cavity</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=829&amp;Focus=9676#Comment_9676</link>
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		<pubDate>Tue, 20 Nov 2007 08:42:26 +0000</pubDate>
		<author>Pingy</author>
		<description>
			<![CDATA[That's much clearer now thanks Tony. It was the typing error that threw me with the perp joints.<br /><br />Yes there will be a concrete floor on the inside.]]>
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		<title>250mm wide wall cavity</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=829&amp;Focus=9677#Comment_9677</link>
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		<pubDate>Tue, 20 Nov 2007 08:43:44 +0000</pubDate>
		<author>tony</author>
		<description>
			<![CDATA[Is the concrete floor there already?]]>
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	<item>
		<title>250mm wide wall cavity</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=829&amp;Focus=9702#Comment_9702</link>
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		<pubDate>Tue, 20 Nov 2007 19:52:33 +0000</pubDate>
		<author>Pingy</author>
		<description>
			<![CDATA[There is a concrete floor in part of the building but it's very uneven as it was used for housing cows, ie. sloping floor, feeding troughs and drainage channels. Other areas of floor are made of red brick. All floors will have to be taken up and a new one installed.<br /><br />With regard to thermal mass would it be wise to use something like thermalite blocks in the 'cold' parts of the building (north and east sides) where there would not be any solar gain?]]>
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	<item>
		<title>250mm wide wall cavity</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=829&amp;Focus=9703#Comment_9703</link>
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		<pubDate>Tue, 20 Nov 2007 20:27:26 +0000</pubDate>
		<author>tony</author>
		<description>
			<![CDATA[If the new cavity is going to go below floor level no need to worry about draining it.<br /><br />Just use same heavy or medium density blocks everywhere.]]>
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		<title>250mm wide wall cavity</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=829&amp;Focus=9705#Comment_9705</link>
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		<pubDate>Tue, 20 Nov 2007 20:54:25 +0000</pubDate>
		<author>Pingy</author>
		<description>
			<![CDATA[Okay that seems sorted. Now for the openings....How would you recommend finishing around door and window openings? Reading Brenda & Robert Vale's Autonomous House they used wbp ply formers which stayed in place to reduce thermal bridging. Is this the way to go?]]>
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	<item>
		<title>250mm wide wall cavity</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=829&amp;Focus=9708#Comment_9708</link>
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		<pubDate>Tue, 20 Nov 2007 21:47:09 +0000</pubDate>
		<author>tony</author>
		<description>
			<![CDATA[With a wide cavity I fit the windows and doors to the back of the outside skin and then flare the reveals. They are strong there and I m very naughty and close the cavity with insulated plasterboard only! Been doing it for 20 yrs+ never a problem and sometimes only acrylic sealed to the window.<img src="/newforum/extensions/Vanillacons/smilies/standard/shamed.gif" alt=":shamed:" title=":shamed:" />]]>
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