Green Building Forum - metal roofing Tue, 19 Dec 2023 07:28:38 +0000 http://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 metal roofing http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=270751#Comment_270751 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=270751#Comment_270751 Wed, 17 Oct 2018 17:22:43 +0100 marsaday
The DIY route is certainly possible if just doing straight panels BUT any detail around window openings or verges and it gets a whole lot complicated.

The install manuals are very poor to understand and i have had difficulty doing my square windows. Luckily they had a man in my area doing a course and so he came round for the morning and showed me how to do a window.

He was saying the quality of instruction is poor and they have been on about doing some Utube videos for about 10 years, but no one will do them. A bit weird really because videos would end up selling loads more of this product.

They haven't sent me enough self tapping screws for my job as well (plus the special silicone you need) and so i have asked them to send me some more out. They will but want to charge me £60 for 2 tubes and 100 screws.

I am currently trying to get them to see reason that they are the ones who tell the customer what they need and are supposed to provide everything in the price quoted. I will now have to miss a good number of days and still have a non W tight building.

I also have a 3 spare roof panels if anyone is interested.]]>
metal roofing http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=270773#Comment_270773 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=270773#Comment_270773 Thu, 18 Oct 2018 20:22:59 +0100 marsaday
I sourced my own silicon and have used some capped brown self tap screws.

Apparently i should know how much silicone and screws to use and so should have asked for more.

I have never worked on a metal roof before and they were fully aware i was a DIY installer. So i was totally guided by their directions.

I wouldn't use this company again, even though the end product is good.]]>
metal roofing http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=270776#Comment_270776 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=270776#Comment_270776 Thu, 18 Oct 2018 21:03:40 +0100 gyrogear
P.S. had a read of their installation manual -
https://www.tatasteelconstruction.com/static_files/Tata%20Steel/content/products/Colorcoat%20Urban/Installation%20Guide%20Tata%20Steel%202014.pdf

It requires thorough revision !

"helping achieve forthcoming legislation".

:devil:

gg]]>
metal roofing http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=271031#Comment_271031 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=271031#Comment_271031 Wed, 07 Nov 2018 11:59:11 +0000 renewablejohn metal roofing http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=271033#Comment_271033 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=271033#Comment_271033 Wed, 07 Nov 2018 14:52:34 +0000 djh Posted By: renewablejohnlooking to attach solar direct to the seams using the special clamps
Note that the clamps are not cheap :cry:

Zinc or a lead grey colour might be appropriate? No idea on current prices, sorry.]]>
metal roofing http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=271043#Comment_271043 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=271043#Comment_271043 Wed, 07 Nov 2018 23:35:34 +0000 retrofrit metal roofing http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=271044#Comment_271044 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=271044#Comment_271044 Wed, 07 Nov 2018 23:38:33 +0000 retrofrit http://www.euroclad.com/roofs/vieo-roof-profile/]]> metal roofing http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=283972#Comment_283972 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=283972#Comment_283972 Mon, 19 Oct 2020 15:26:58 +0100 muddy Recently I had to take up my standing seam aluminium roof apart because the plywood deck was showing a 'growth' and delaminating on its exposed edge.
I am sure that I had installed it according to the suppliers instructions.
Beyond the annoyance of having to do this, the biggest concern that I have is the number of corrosion perforations i have discovered through the aluminium next to the stainless steel sliding clips, and in a few cases next to screws fastening the deck.
I had assumed that aluminium didn't corrode. But with condensation on the underside and a dissimilar metal it does.
I was intending reinstalling it.]]>
metal roofing http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=283977#Comment_283977 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=283977#Comment_283977 Mon, 19 Oct 2020 19:16:43 +0100 Peter_in_Hungary Posted By: muddyI had assumed that aluminium didn't corrode.
Aluminium doesn't rust
It gentle corrodes into dust !!!

Something I remember from my distant past. You have to be very careful about what metals are in contact with ali. especially if there is (acid) rain about.]]>
metal roofing http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=283979#Comment_283979 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=283979#Comment_283979 Mon, 19 Oct 2020 21:28:14 +0100 djh Posted By: muddyI commented in this discussion previously.
Recently I had to take up my standing seam aluminium roof apart because the plywood deck was showing a 'growth' and delaminating on its exposed edge.
Aluminium is sometimes used to make sacrificial anodes for boats and other things, as is zinc, because they are strongly electronegative. Stainless steel is on the other end of the scale - electropositive - which is why it doesn't rust easily. Put the two together in the presence of an electrolyte and the aluminium will corrode quite quickly. How old is your roof? I'm curious because I have a similar aluminium roof on a plywood deck :cry:

The other question is where does the electrolyte come from? The clips are supposed to be protected from rain by the standing seam over the top. Pure water doesn't conduct very much but rain sometimes has enough impurities that it does to some extent. Salt spray is an infamously good electrolyte. On my roof there's a 'metal' underlaying membrane to allow any condensation or any other water that gets in there to drain out. (it's a normal breathable membrane with plastic 'scotchbrite' on top)

Oh, and having reread the thread I note that we have some green staining on the north side, which looks a bit unkempt. The roof is mill finish aluminium. Our window cleaner is planning to have a go at cleaning the green off sometime. We had some very pretty sedum growing in the gutter as well, which I've removed and put in a pot.]]>
metal roofing http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=283981#Comment_283981 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=283981#Comment_283981 Tue, 20 Oct 2020 09:01:59 +0100 muddy But the condensation should be pure water, unless it has picked up salts from the plywood, or even from the warmcell insulation between the rafters. So why corrosion?
The roof from the inside is, plasterboard, intello plus vapour barrier, 9x3 timber joist with warmcell between, 50mm foil faced pu insulation, 18 mm exterior ply, breathable roofing membrane, Vieo roofing sheets. The pitch is about 5 degrees, facing southwest.]]>
metal roofing http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=283983#Comment_283983 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=283983#Comment_283983 Tue, 20 Oct 2020 10:08:01 +0100 fostertom
Note, electrolytic corrosion doesn't happen just because the two metals are wetted by an electrolyte, e.g. a continuous film of same, like condensation. The two metals also have to be in direct contact with each other, so that an electrical circuit is formed.]]>
metal roofing http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=283985#Comment_283985 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=283985#Comment_283985 Tue, 20 Oct 2020 10:29:54 +0100 muddy metal roofing http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=283987#Comment_283987 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=283987#Comment_283987 Tue, 20 Oct 2020 10:55:53 +0100 WillInAberdeen
When a metal is partly in freely oxygenated air and partly in a low-oxygen environment like under decomposing leafmould, there can be 'crevice corrosion' around the deposit. This effect has drilled a lot of holes in the zinc-coating on my steel garage roof, which is rusting through in those places. The same effect can happen under the heads of fasteners.

Are there any insulating plastic washer between the SS and the ali to restrict the current of corrosion electrons?

https://fractory.com/aluminium-corrosion/]]>
metal roofing http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=283988#Comment_283988 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=283988#Comment_283988 Tue, 20 Oct 2020 11:13:57 +0100 muddy Leaves don't accumulate, there is a thin layer of grime, to be expected. The corrosion is on the underside.

I am in conversation with the manufacturer. They are questioning the intello vapour barrier as a sufficient vapour barrier.]]>
metal roofing http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=283989#Comment_283989 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=283989#Comment_283989 Tue, 20 Oct 2020 11:14:19 +0100 djh Posted By: muddyThe stainless clips and the aluminium are in direct contact, and condensation is to be expected, so it should also be expected that corrosion will occur?
It might be worth asking Euroclad. Depending how old it is and whether you state you are or are not trying to make a warranty claim, they might be more or less forthcoming? :devil:

Their BBA just mentions a breathable membrane, so it's supposed to be OK with what you've got. Your roof sounds very similar to ours, although we don't have the layer of PUR. Yours has a fairly small slope so I suppose water might take time to drain. Ours is barrel-vaulted so there's a small area that's very flat and most of it is reasonably steep (it got called the ski jump while we were building it).]]>
metal roofing http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=283994#Comment_283994 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=283994#Comment_283994 Tue, 20 Oct 2020 12:55:21 +0100 muddy Leaves don't accumulate, there is a thin layer of grime, to be expected. The corrosion is on the underside.

I am in conversation with the manufacturer. They are questioning the intello vapour barrier as a sufficient vapour barrier.]]>
metal roofing http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=284004#Comment_284004 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12010&Focus=284004#Comment_284004 Tue, 20 Oct 2020 21:35:06 +0100 djh Posted By: muddyI am in conversation with the manufacturer. They are questioning the intello vapour barrier as a sufficient vapour barrier.
Refer them to Niall Crosson at Ecological Building Systems. He did a full condensation analysis of my roof, which also has Intello at the bottom and warranted the whole thing on the basis of it. Mind you, it was their breathable membrane I used as well, so that may have had something to do with it. But he should be able to reassure Euroclad.

How long has the roof been there? Where is it?]]>