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			<title>Green Building Forum - Missing insulation under door sils</title>
			<lastBuildDate>Tue, 26 May 2026 04:02:35 +0100</lastBuildDate>
			<link>https://www.greenbuildingforum.co.uk/newforum/</link>
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		<title>Missing insulation under door sils</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17636&amp;Focus=298714#Comment_298714</link>
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		<pubDate>Thu, 10 Nov 2022 12:47:00 +0000</pubDate>
		<author>Newbuild</author>
		<description>
			<![CDATA[I have some missing insulation underneath some doors that go to a balcony. As far as I can tell its roughly like the detail attached (I used a endoscope from outside and could see through to the first floor joist).<br /><br />Access from inside is limited as the floor is tiled; is there anything I can do from outside to fill the void? I could quite easily drill hole through the mortar joints under the sil.]]>
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		<title>Missing insulation under door sils</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17636&amp;Focus=298723#Comment_298723</link>
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		<pubDate>Thu, 10 Nov 2022 15:22:26 +0000</pubDate>
		<author>Mike1</author>
		<description>
			<![CDATA[A can of low-expansion foam (illbuck FM330 or similar) could be the easiest option; use multiples holes so you can see how it's expanding / how full it is.]]>
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		<title>Missing insulation under door sils</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17636&amp;Focus=298725#Comment_298725</link>
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		<pubDate>Thu, 10 Nov 2022 15:39:33 +0000</pubDate>
		<author>Newbuild</author>
		<description>
			<![CDATA[How far can you reach with that approach? The blockwork is about 30cm wide so my holes in the perps would be that distance between each other.<br /><br />I've considered removing the window set but its a massive job to do that.]]>
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		<title>Missing insulation under door sils</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17636&amp;Focus=298751#Comment_298751</link>
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		<pubDate>Fri, 11 Nov 2022 12:29:30 +0000</pubDate>
		<author>Mike1</author>
		<description>
			<![CDATA[That shouldn't be a problem - low expansion foam will still expand, but won't go mad and there's less risk of deforming the door frame. Maybe you - or a friend - can use the endoscope a couple of joints away to monitor what's happening for the initial fills.]]>
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		<title>Missing insulation under door sils</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17636&amp;Focus=298753#Comment_298753</link>
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		<pubDate>Fri, 11 Nov 2022 15:26:52 +0000</pubDate>
		<author>tony</author>
		<description>
			<![CDATA[EPS beads blown in for me]]>
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		<title>Missing insulation under door sils</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17636&amp;Focus=298757#Comment_298757</link>
		<guid isPermaLink="false">https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17636&amp;Focus=298757#Comment_298757</guid>
		<pubDate>Fri, 11 Nov 2022 15:53:19 +0000</pubDate>
		<author>djh</author>
		<description>
			<![CDATA[<blockquote ><cite >Posted By: tony</cite>EPS beads blown in for me</blockquote>What size holes does that need?]]>
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		<title>Missing insulation under door sils</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17636&amp;Focus=298758#Comment_298758</link>
		<guid isPermaLink="false">https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17636&amp;Focus=298758#Comment_298758</guid>
		<pubDate>Fri, 11 Nov 2022 18:10:15 +0000</pubDate>
		<author>Newbuild</author>
		<description>
			<![CDATA[Is it something you can DIY? My only concern would be that if the inner leaf is short of the subfloor, it will blow beads into the void under the floorboards and first joist and take absolutely loads of beads.]]>
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		<title>Missing insulation under door sils</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17636&amp;Focus=298763#Comment_298763</link>
		<guid isPermaLink="false">https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17636&amp;Focus=298763#Comment_298763</guid>
		<pubDate>Fri, 11 Nov 2022 19:38:39 +0000</pubDate>
		<author>djh</author>
		<description>
			<![CDATA[<blockquote ><cite >Posted By: Newbuild</cite>My only concern would be that if the inner leaf is short of the subfloor</blockquote>In your diagram, the floor is resting on the inner leaf. So how would it be short?]]>
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		<title>Missing insulation under door sils</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17636&amp;Focus=298765#Comment_298765</link>
		<guid isPermaLink="false">https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17636&amp;Focus=298765#Comment_298765</guid>
		<pubDate>Fri, 11 Nov 2022 21:23:52 +0000</pubDate>
		<author>tony</author>
		<description>
			<![CDATA[EPS beads can be blown through 22mm copper or plastic tube , I would do foam to the cavity each side of the reveal first to stop beads going down the cavity]]>
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	<item>
		<title>Missing insulation under door sils</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17636&amp;Focus=298766#Comment_298766</link>
		<guid isPermaLink="false">https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17636&amp;Focus=298766#Comment_298766</guid>
		<pubDate>Sat, 12 Nov 2022 00:47:58 +0000</pubDate>
		<author>Newbuild</author>
		<description>
			<![CDATA[For whatever reason in some areas the inner leaf is lower than the subfloor, with my borescope I can go straight through the cavity to a floor joist.<br /><br />Hopefully rest of the cavity is full filled.]]>
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