Wed, 08 Jul 2026 22:41:01 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298226#Comment_298226 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298226#Comment_298226 Thu, 13 Oct 2022 14:23:55 +0100 DWHITE
Is it fine just to blast expanding foam around this and then cut it away level with the cement boards? The gap is 15mm at it's most narrow, 40mm at it's widest point. Nasty draught and cold emanating from the hole. Picture (hopefully) attached.

Bonus question: In the event I fill the void with roughly 300mm of EPS beads. Would this suffice as the insulation layer for a thin retrofit wet UFH system to be laid on top of the block/beam? My thought process being that you could argue the block and beam acts as a useful thermal mass or would the thermal bypass of the block and beam render this ineffective? This is a poorly built 1990's house after all!

Any help is greatly appreciated and will be acted upon!]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298227#Comment_298227 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298227#Comment_298227 Thu, 13 Oct 2022 14:38:09 +0100 Peter_in_Hungary https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298229#Comment_298229 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298229#Comment_298229 Thu, 13 Oct 2022 15:23:47 +0100 DWHITE https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298253#Comment_298253 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298253#Comment_298253 Fri, 14 Oct 2022 22:08:16 +0100 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298255#Comment_298255 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298255#Comment_298255 Sat, 15 Oct 2022 08:16:24 +0100 philedge
If youre able to do it maybe fast track the addition of the beads so you can get the air vents closed up. Its extra work but Id take out the vent in the external leaf and seal the opening in the inner leaf to make sure theres no airflow through the cavity and into the beads.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298297#Comment_298297 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298297#Comment_298297 Tue, 18 Oct 2022 22:09:57 +0100 DWHITE
I have several greenbuildforum discussions saved regarding the beads to review and have received a quote locally (Nottingham) for the beads of £990 for 20 cubic metres / 700 cubic feet delivered. It's quite a substantial outlay and am still not sure about how to blow them in, saw something about a wood chip blower (expensive!) and positive/negative pressures ensuring beads will fill the space. I also need to check that the block and beam void doesn't continue across to the neighbours void (I'm end of a terrace in a row of three houses).]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298306#Comment_298306 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298306#Comment_298306 Wed, 19 Oct 2022 12:15:08 +0100 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298310#Comment_298310 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298310#Comment_298310 Wed, 19 Oct 2022 18:29:46 +0100 philedge https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298313#Comment_298313 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298313#Comment_298313 Wed, 19 Oct 2022 21:39:39 +0100 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298315#Comment_298315 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298315#Comment_298315 Thu, 20 Oct 2022 07:05:14 +0100 cjard https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298316#Comment_298316 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298316#Comment_298316 Thu, 20 Oct 2022 07:08:09 +0100 cjard https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298317#Comment_298317 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298317#Comment_298317 Thu, 20 Oct 2022 07:16:55 +0100 cjard https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298318#Comment_298318 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298318#Comment_298318 Thu, 20 Oct 2022 07:19:16 +0100 cjard https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298331#Comment_298331 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298331#Comment_298331 Thu, 20 Oct 2022 22:12:02 +0100 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298344#Comment_298344 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298344#Comment_298344 Fri, 21 Oct 2022 14:32:41 +0100 djh Posted By: cjardThat would be a great way of recycling it philedge/tony- it's a shame it's so bulky and awkward to transport but I'm struck that councils on recycling rounds/HWRCs could collect packaging and shred it/sell it. It always seems to go in the non-recyclable waste hoppersI think they're focussed on recycling (i.e recovering raw material that can make more new material) rather than reuse, which in principle would be better. But I suspect the council has problems with not being able to control the cleanliness and quality very easily, plus the difficulty of transporting it. We have a local volunteer-run recycling centre, but it doesn't recycle/reuse EPS either AFAIK, although it does do various other things the council doesn't. Volunteers are cheaper and have more practical control over what they accept, I suspect.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298412#Comment_298412 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298412#Comment_298412 Tue, 25 Oct 2022 09:02:20 +0100 DWHITE
cjard,
interesting thoughts re the UFH. I'll put it in the maybe pile for further down the line. The house isn't that big so removing wall mounted radiators would be a huge benefit for layout options but, as always is the case, I'll focus on insulation before UFH is considered.

Tony,
The garden vac sounds perfect! I'm Nottingham based so a little far from you. If you have any images of the garden vac set up then that would be greatly appreciated. Did you just hook the tube straight in to a bag of beads?
I agree the price seems a little high and it is compared to only a few years ago. Was hoping for the gov to perhaps eliminate vat on insulation given the energy situation but think I'm dreaming on that front. I have searched ebay for EPS beads with no luck, would you recommend any other bead alternatives to search for?

Really appreciated all!]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298413#Comment_298413 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17604&Focus=298413#Comment_298413 Tue, 25 Oct 2022 10:20:32 +0100 DWHITE
Have since found EPS/polystyrene beads for £15 a 10ft3 bag (£457) total they don't claim any insulating properties rather are bean bag fill type. Am I correct to assume these will suffice?]]>