Ralph Posted September 25, 2021 Share Posted September 25, 2021 (edited) We are having a issue with our Cedral. It's been up for 5 months or so and we are seeing some discolouration. The Cedral rep apparently thinks this is efflorescence from salts, like you get with concrete (builder sent them photos). However, the paint now looks to be flaking off quite badly, you can scrape it with a fingernail in places. I'm waiting on builder and architect to organise someone from Cedral to actually come out and look at it. Any thoughts? I'm not sure if we're looking at a manufacturing issue or what. Thanks Edited September 25, 2021 by Ralph 1 1 Link to comment Share on other sites More sharing options...
Pocster Posted September 25, 2021 Share Posted September 25, 2021 Got the same cladding . Been up maybe 2 yrs , no issues . Is there proper ventilation gap behind the panels ? Link to comment Share on other sites More sharing options...
Ralph Posted September 25, 2021 Author Share Posted September 25, 2021 There is, gap at bottom and top with insect screens. Link to comment Share on other sites More sharing options...
Pocster Posted September 25, 2021 Share Posted September 25, 2021 2 minutes ago, Ralph said: There is, gap at bottom and top with insect screens. How wide ? . Air vent at the top ? Link to comment Share on other sites More sharing options...
Ralph Posted September 25, 2021 Author Share Posted September 25, 2021 Not 100% sure I will check.It was installed by builder. Could that cause the issue? Link to comment Share on other sites More sharing options...
Pocster Posted September 25, 2021 Share Posted September 25, 2021 21 minutes ago, Ralph said: Not 100% sure I will check.It was installed by builder. Could that cause the issue? No idea . But check ! Link to comment Share on other sites More sharing options...
Ralph Posted September 25, 2021 Author Share Posted September 25, 2021 So this is a photo of the top of the cedral before the standing seam metal went on above it. That looks like a 10mm gap so should be OK and I know it has the same at the bottom. I'll have a good check tomorrow. Link to comment Share on other sites More sharing options...
Pocster Posted September 25, 2021 Share Posted September 25, 2021 2 minutes ago, Ralph said: So this is a photo of the top of the cedral before the standing seam metal went on above it. That looks like a 10mm gap so should be OK and I know it has the same at the bottom. I'll have a good check tomorrow. Certainly looks ok Link to comment Share on other sites More sharing options...
Pocster Posted September 25, 2021 Share Posted September 25, 2021 I remember when I installed it that the Battons needed To allow air flow . ( from the cedral instructions) … Link to comment Share on other sites More sharing options...
Dreadnaught Posted September 25, 2021 Share Posted September 25, 2021 From your photo, it looks like the one's nearer the ground are suffering more. Is that so? Is it restricted to one region or set of planks or are they all showing symptoms? Are you just unlucky in that you received a bad batch of planks from the production line? Link to comment Share on other sites More sharing options...
Ralph Posted September 25, 2021 Author Share Posted September 25, 2021 1 hour ago, pocster said: I remember when I installed it that the Battons needed To allow air flow . ( from the cedral instructions) … That looks pretty much like what was done. 7 minutes ago, Dreadnaught said: From your photo, it looks like the one's nearer the ground are suffering more. Is that so? Is it restricted to one region or set of planks or are they all showing symptoms? Are you just unlucky in that you received a bad batch of planks from the production line? The ones that are flaking are near the bottom but the efflorescence, if that's what it is seems to be at all levels but concentrated at the ends of the planks. I have a feeling Cedral will blame installation and builder will blame production. Link to comment Share on other sites More sharing options...
LA3222 Posted September 25, 2021 Share Posted September 25, 2021 (edited) I cant recall as it's so long since I last looked into cedral but I thought the required ventilation gap was significantly more than the 10mm you mention - I have 50mm in my head, but I may be wrong! Just checked, it's 30mm behind planks. Edited September 25, 2021 by LA3222 1 Link to comment Share on other sites More sharing options...
Pocster Posted September 26, 2021 Share Posted September 26, 2021 8 hours ago, LA3222 said: I cant recall as it's so long since I last looked into cedral but I thought the required ventilation gap was significantly more than the 10mm you mention - I have 50mm in my head, but I may be wrong! Just checked, it's 30mm behind planks. I was thinking 50mm aswell . But I’m not on site so can’t confirm . I can check tomorrow….. Link to comment Share on other sites More sharing options...
Pocster Posted September 26, 2021 Share Posted September 26, 2021 9 hours ago, Ralph said: That looks pretty much like what was done. The ones that are flaking are near the bottom but the efflorescence, if that's what it is seems to be at all levels but concentrated at the ends of the planks. I have a feeling Cedral will blame installation and builder will blame production. I did think these planks didn’t rot , warp , fade I.e everything proof . That’s why I choose them - they do scratch easy though . So if it is efflorescence I’d be surprised. But if airflow is restricted then maybe that is the issue . Link to comment Share on other sites More sharing options...
LA3222 Posted September 26, 2021 Share Posted September 26, 2021 I'm curious about this as I am cladding the end but of my build at some point, probably a next summer job but I had Cedral in mind for the task. Link to comment Share on other sites More sharing options...
Ralph Posted September 26, 2021 Author Share Posted September 26, 2021 Hopefully we'll get some sort of inspection from Cedral, I'll post an update. Link to comment Share on other sites More sharing options...
Ralph Posted September 26, 2021 Author Share Posted September 26, 2021 Had a closer look today. I think the major damage has been done by a whacker plate when the path was going in. Someone has then painted over with the touch up paint. They have then washed it and the paint had flaked off. However, I am concerned that the vent at the top of the cedral had been covered by the drip lip of the standing seam, as in the photo. Unless it's venting behind the standing seam? Link to comment Share on other sites More sharing options...
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