Tue, 19 May 2026 16:45:34 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18255&Focus=307569#Comment_307569 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18255&Focus=307569#Comment_307569 Fri, 27 Dec 2024 16:27:36 +0000 Ross87
Does anyone on here have much experience using Stormdry (or similar products)?
It seems to divide opinions..

I have a couple of exposed sash window reveals on an 1890s Victorian end terrace that occasionally get a penetrating damp issue.

This only happens very occasionaly (perhaps once a year) when driving rain makes a small damp patch on the internal plaster.

Previous owners seem to have experimented with renders on the reveal, indicating the original Victorian detail wasn’t perfect.

The pointing and sealants are in pretty good shape.

Presumably lime plaster with a good breathable paint would also be more forgiving than gypsum which leaves a slight brown stain?

In most cases I’m reluctant to apply non reversible modern materials to old buildings. But this could be an exception.

Thanks
Ross]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18255&Focus=307570#Comment_307570 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18255&Focus=307570#Comment_307570 Fri, 27 Dec 2024 19:43:39 +0000 Nick Parsons
*Before Stormdry existed, AFAIK.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18255&Focus=307571#Comment_307571 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18255&Focus=307571#Comment_307571 Fri, 27 Dec 2024 20:29:42 +0000 djh
Outdoors we have Beeckosil on the lime render and that also seems to work well but is obviously coloured.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18255&Focus=307572#Comment_307572 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18255&Focus=307572#Comment_307572 Sat, 28 Dec 2024 16:14:45 +0000 Cliff Pope https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18255&Focus=307573#Comment_307573 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18255&Focus=307573#Comment_307573 Sat, 28 Dec 2024 18:54:24 +0000 Peter_in_Hungary https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18255&Focus=307575#Comment_307575 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18255&Focus=307575#Comment_307575 Sun, 29 Dec 2024 12:33:01 +0000 Dominic Cooney https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18255&Focus=307576#Comment_307576 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18255&Focus=307576#Comment_307576 Sun, 29 Dec 2024 12:35:27 +0000 Dominic Cooney https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18255&Focus=307577#Comment_307577 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18255&Focus=307577#Comment_307577 Sun, 29 Dec 2024 12:36:11 +0000 Dominic Cooney https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18255&Focus=307578#Comment_307578 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18255&Focus=307578#Comment_307578 Sun, 29 Dec 2024 12:39:01 +0000 Dominic Cooney https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18255&Focus=307579#Comment_307579 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18255&Focus=307579#Comment_307579 Thu, 02 Jan 2025 12:32:46 +0000 sgt_woulds
It reduces overall breathability by about 10% according to the blurb.

I think S.P.A.B. still don't recommend any wall treatments for historic walls...

Still, it's got to be better than slapping on a concrete render like in the bad old days.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18255&Focus=307592#Comment_307592 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18255&Focus=307592#Comment_307592 Mon, 06 Jan 2025 16:06:32 +0000 Ross87 Interesting video here that seems to demonstrate the breathability:
https://www.youtube.com/watch?v=-eq5zNWnO8o

As mentioned above, seems to currently be minimal endorsement from historic building professional bodies. At the same time minimal evidence of any destruction to masonry.

Potentially it may get more popular to keep moisture away from internal insulation.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18255&Focus=307600#Comment_307600 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18255&Focus=307600#Comment_307600 Tue, 07 Jan 2025 18:41:47 +0000 fostertom
Mr SkillBuilder missed the opportunity of emphasising that it's the difference between water as liquid, and water as vapour, that's in play here. Some comments obviously didn't get that. And why, in terms of molecule size. Which could be extended to experience how and why airtightness (i.e. permeation) of the mix of molecules of air (80% N2, 20% O2, plus variable H20 vapour and microscopic amounts of Ar and CO2) is expolitably different from the permeation of H2O molecules alone.

And I agree with the fourth comment: "Have you done the same with a control sample? Without treatment showing water going trough?" and more.]]>