Sat, 10 Oct 2026 21:10:57 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17579&Focus=297788#Comment_297788 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17579&Focus=297788#Comment_297788 Mon, 26 Sep 2022 08:21:13 +0100 Sandfordbarn
Does anyone have any experience applying it directly to stone walls, in particular the blanket rather than the boards. Then direct plaster/lime over that?

I'm keen on this finish as I'd prefer a more irregular finish, rather than flat boards.

I've seen some European company are applying aerogel render externally (with aerogel granules in the render mix), but I've not heard back from any of them.

Any shared experiences on this would be very helpful - it seems to be a revolutionary product?]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17579&Focus=310997#Comment_310997 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17579&Focus=310997#Comment_310997 Tue, 14 Jul 2026 20:31:09 +0100 stonecold The issue with stone walls is that they are often uneven - especially bulging at the bottom - and that can mean it's awkward to get the depth consistent. And of course avoiding air gaps is critical too, so I think you'd need to level it first..

If your plan is for a flat and level finish then you could put wood wool words over, and plaster those.

Cornerstone has a new insulated lime plaster that is around similar values to wood fibre, stome wool and Diathonite]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17579&Focus=311000#Comment_311000 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17579&Focus=311000#Comment_311000 Tue, 14 Jul 2026 22:12:58 +0100 fostertom https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17579&Focus=311014#Comment_311014 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17579&Focus=311014#Comment_311014 Fri, 17 Jul 2026 10:19:02 +0100 Doubting_Thomas
My involvement was mainly on the initial lime re-pointing works (not the subsequent plastering), but there is a good write up here: https://ggbec.co.uk/portfolio/hop-pole-inn-grade-ii-listed-building-retrofit/


There were two main products used on the walls:
https://www.coreconservation.co.uk/plaster/termointonaco-2020-mgn/
https://www.coreconservation.co.uk/plaster/termorasante-aerogel-mgn/

From what I can tell it has been a moderate success, with a measureable thermal improvement. Whether it works out better on a cost/benefit basis compared to a flexible woodfibre + lime coat would need more detailed calculations though.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17579&Focus=311060#Comment_311060 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17579&Focus=311060#Comment_311060 Tue, 21 Jul 2026 18:44:40 +0100 Mike1
The main disadvantage of aerogel is the excessively high price. In central London the value of the floor area saved may be higher than cost of the aerogel, but elsewhere I'd guess not.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17579&Focus=311064#Comment_311064 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17579&Focus=311064#Comment_311064 Tue, 21 Jul 2026 20:53:32 +0100 djh https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17579&Focus=311074#Comment_311074 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17579&Focus=311074#Comment_311074 Wed, 22 Jul 2026 13:19:15 +0100 Mike1 Posted By: djhIs aerogel render cheaper in France? Or otherwise, why does it get used if the economics are unfavourable?
Just looked that up and it's said to be:
- €400 to €500 /m² (thickness unspecified, https://www.dsdrenov.com/ravalement-de-facade/enduit-isolant/prix-enduit-exterieur-isolant/)
- €350 to €400 /m² (thickness unspecified, https://renodit.fr/articles/laerogel-en-isolation-un-materiau-innovant-encore-peu-connu)
- €150 to €200 /m² for 3cm (https://renovactu.fr/aerogel-isolant-comment-revolutionne-t-il-lisolation-thermique.html)

In some circumstances - listed buildings, expensive locations (e.g. central Paris) the price would no doubt be worth it. Aerogel renders are also claimed to have a long life (>50 years), which may justify the greater cost for some.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17579&Focus=311120#Comment_311120 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17579&Focus=311120#Comment_311120 Mon, 27 Jul 2026 10:05:07 +0100 fostertom https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17579&Focus=311134#Comment_311134 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17579&Focus=311134#Comment_311134 Wed, 29 Jul 2026 12:20:36 +0100 Doubting_Thomas Posted By: Mike1The main disadvantage of aerogel is the excessively high price. In central London the value of the floor area saved may be higher than cost of the aerogel, but elsewhere I'd guess not.

Bear in mind too the disproportionate insulant performance and how this relates to plaster coating thickness. It may be feasible to use cork or something cheaper within the plaster instead of aerogel, but you either end up with a very thick plaster layer (which takes a lot of coats to build up) to achieve the same u-value, or you accept a worse performance in a standard plaster thickness.

So not solely about floorspace lost, but also what's practical for a plasterer to physically slop onto the wall.

My guess on the uptake/cost difference in Europe is that there is already a bigger market and install industry for lime there, and the aerogel is just seen as a 'performance enhancing' additive.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17579&Focus=311137#Comment_311137 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17579&Focus=311137#Comment_311137 Wed, 29 Jul 2026 15:00:01 +0100 Mike1 Posted By: Doubting_ThomasIt may be feasible to use cork or something cheaper within the plaster instead of aerogelCoincidentally, I've been reading a case study this morning that recommended 40mm of Diathonite - https://www.diasen.com/en/diathonite-evolution/ - as an external renovation render, in which cork seems to be the main insulant.]]>