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			<title>Green Building Forum - Lime (baumit) meets gypsum</title>
			<lastBuildDate>Thu, 25 Jun 2026 06:35:00 +0100</lastBuildDate>
			<link>https://www.greenbuildingforum.co.uk/newforum/</link>
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		<title>Lime (baumit) meets gypsum</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18194&amp;Focus=306785#Comment_306785</link>
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		<pubDate>Mon, 16 Sep 2024 09:26:21 +0100</pubDate>
		<author>RosieB</author>
		<description>
			<![CDATA[Hoping someone can offer some advice please. In the middle of a long renovation of our upstairs. Ended up back to brick. Have applied diathonite lime insulating plaster and wood fibre board to external facing walls. Internal walls and ceilings have been re-skimmed with gypsum. Our amazing plasterer is going to give baumit rk70 and then glatt a go over the woodfibre boards after the lime plasterer I found (with difficulty) had to cancel due to illness. The system seems fairly straight forward (though advice welcome!) but he has very little lime experience so trying to help with research as much as I can! Our main issue is how to deal with the joins between the lime and gypsum. Our upstairs is in the eaves so we have joins at some internal/external wall corner, walls/ceilings, and a couple of verticals wall sections where the top half is gypsum (dormer cheek) and bottom is lime. We have discussed stop beads and mesh options but any thoughts appreciated!]]>
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		<title>Lime (baumit) meets gypsum</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18194&amp;Focus=306787#Comment_306787</link>
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		<pubDate>Mon, 16 Sep 2024 11:29:43 +0100</pubDate>
		<author>djh</author>
		<description>
			<![CDATA[Our external walls are lime plastered and our internal walls are gypsum skimmed over plasterboard. In our case the external walls were completed before we built the internal walls, so I wasn't concerned about the junctions maintaining airtightness or suchlike. But we haven't had any problems at the junctions. I've just had a look and can see some hairline cracks but that's all. If I was concerned I would have looked at putting tape over the junctions before plastering. (Tescon Vana or the like, maybe?)]]>
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		<title>Lime (baumit) meets gypsum</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18194&amp;Focus=306788#Comment_306788</link>
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		<pubDate>Mon, 16 Sep 2024 14:30:20 +0100</pubDate>
		<author>RosieB</author>
		<description>
			<![CDATA[Thanks for that. I completed all the insulation aspects before the internal walls were tackled so not worried about air tightness etc. more just wondered about the join between the two types of plaster. It’s my understanding they don’t merge well?]]>
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	<item>
		<title>Lime (baumit) meets gypsum</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18194&amp;Focus=306789#Comment_306789</link>
		<guid isPermaLink="false">https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18194&amp;Focus=306789#Comment_306789</guid>
		<pubDate>Mon, 16 Sep 2024 16:48:17 +0100</pubDate>
		<author>djh</author>
		<description>
			<![CDATA[Well as I say we completed the external walls first, so there was no question of merging. The gypsum is just brought up to the external wall and smoothed in place. Both walls are painted (with clay paint but I don't think that's important)]]>
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