ProDave Posted November 5, 2016 Share Posted November 5, 2016 There are a couple of us looking at box profile roofing so I have started this thread to talk about it. My first question is where to buy it from. Direct from a roofing supplier? builders merchant? My own roof on a rough measurement is a pitched roof, about 2.1 metres from ridge to eaves, about 3.6 metres wide on each side. Shallow pitch (I need to actually measure it) This is the first box profile roof I have done. It all looks obvious but here are my questions: I want to buy the sheets the exact length I need so I don't have to cut them. I believe the sheets are a standard width a little under 1 metre. I take it it's okay to "adjust" the length by perhaps a greater overlap on one section rather than to cut sheets. What is the "standard" overlap? 1 box? 2 boxes? or more? I assume the ridge piece has to be ordered to match the pitch of the roof. At the end (verge) it is covered by an L shaped piece. I have a 150mm thick timber verge and I want that completely covered by the L shaped end piece. I have seen these quoted as 150mm or 200mm. I guess I need the 200mm one as it has to cover the thickness of the box profile as well as my timber verge. What is the depth of the box section typically? Link to comment Share on other sites More sharing options...
tonyshouse Posted November 5, 2016 Share Posted November 5, 2016 Specialist merchant, roofing merchant, I would use insulated sheets 80mm thick minimum Link to comment Share on other sites More sharing options...
Crofter Posted November 6, 2016 Share Posted November 6, 2016 (edited) I've been using http://www.steelroofsheets.co.uk for quick quotes and info. In my case I'm going for corrugated, which has a profile thickness of 19mm and a cover width of 990mm. They have info for the box sections too, and these things appear to be pretty much standard (box profiles being either 32/1000 or 34/1000, IIRC). I'm not going for insulated sheets (no point, as they have a ventilated/drained space under them) but I am thinking of getting the anticondensation flocking. Edit- used wrong url, oops. Edited November 6, 2016 by Crofter Too early in the morning Link to comment Share on other sites More sharing options...
ProDave Posted November 6, 2016 Author Share Posted November 6, 2016 Thanks Crofter a lot of information there on that link. The only "issue" I can see with my rof at 3.6 metres wide, is they only sell the ridge pieces in 3 metre lengths. Link to comment Share on other sites More sharing options...
Stones Posted November 6, 2016 Share Posted November 6, 2016 When I was looking at metal roofing, I spoke to and had a quote from http://planwell.co.uk/ Planwell Profile sheets - £15 per m2 inc sheets, ridge and barge flashings, fixings and delivery. IIRC Planwell will supply in whatever finished length you want. They were certainly very helpful on the phone. I also looked at Tata Colorcoat Urban Standing Seam - £30 per m2 inc sheets, ridge, verge, valley, ventilation, fixings and tools. Exc delivery £650. Link to comment Share on other sites More sharing options...
Ferdinand Posted November 6, 2016 Share Posted November 6, 2016 (edited) I used Coverworld for my conservatory replacement roof. This is Chesterfield. http://www.coverworld.co.uk/ The roof has been robust for several years, but I felt gouged on £50 delivery for around 6 miles on a £400 order. Otherwise they were great to deal with. Very happy to take smallish orders. My comment would be choose widths narrow enough to go on your trailer and collect it yourself. Say 2.4m wide x2 would also be easier to handle on site.I have had no problems with wicking through joints between sheets. A family member did their terraced read add-on with the insulation-attached stuff and found it an expensive pain to work with eg cutting. Ferdinand Edited November 6, 2016 by Ferdinand Link to comment Share on other sites More sharing options...
Crofter Posted November 6, 2016 Share Posted November 6, 2016 Planwell have been recommended to me by various people but I found them quite expensive. The salesmen from BMs who invited themselves onto my site both claimed they could easily undercut Planwell. Any thoughts on the anti-con lining? It was suggested to me by a builder who was up on holiday and nosying around my site, but he did seem to know what he was talking about. Link to comment Share on other sites More sharing options...
ProDave Posted November 6, 2016 Author Share Posted November 6, 2016 I will have to cost the anti condensation lining. In theory it's not needed, but would give the roofing membrane less to do I suppose. I wired one house that had a box profile roof that continued as bare metal beyond the edge of the house to cover a verandah. In cold frosty weather, as it warmed up in the morning it "rained" a lot under there. Link to comment Share on other sites More sharing options...
tonyshouse Posted November 6, 2016 Share Posted November 6, 2016 Ridge pieces can be joined by overlapping 250mm no sealing the back of the join with mastic. Link to comment Share on other sites More sharing options...
ProDave Posted November 6, 2016 Author Share Posted November 6, 2016 Joining them is not the issue. Waste is. My roof is 3.6 metres long, so a 3M length and a 1M length would do nicely. Having to buy two 3M lengths is just "wrong" I can see me designing my wood shed to be a pitched roof 2M long JUST to use up the offcut. Link to comment Share on other sites More sharing options...
Crofter Posted November 6, 2016 Share Posted November 6, 2016 30 minutes ago, ProDave said: Joining them is not the issue. Waste is. My roof is 3.6 metres long, so a 3M length and a 1M length would do nicely. Having to buy two 3M lengths is just "wrong" I can see me designing my wood shed to be a pitched roof 2M long JUST to use up the offcut. Blimey we'll make a teuchter of you yet! Link to comment Share on other sites More sharing options...
Rattyjohn Posted November 6, 2016 Share Posted November 6, 2016 I used a company called Excelclad for my box profile roofing sheets. http://www.excelclad.co.uk Even though they are based in Shropshire and I'm building on Skye, they were cheaper than Planwell and the local merchants, even with the delivery costs. My roofing contractor was most impressed with the quality and reckons they are superior to anything he has used before, so much so that he said he would use them on a regular basis. Also a very helpful and friendly company to deal with and they offer a greater range of colours than most. 1 Link to comment Share on other sites More sharing options...
Crofter Posted November 6, 2016 Share Posted November 6, 2016 1 hour ago, Rattyjohn said: I used a company called Excelclad for my box profile roofing sheets. http://www.excelclad.co.uk Even though they are based in Shropshire and I'm building on Skye, they were cheaper than Planwell and the local merchants, even with the delivery costs. My roofing contractor was most impressed with the quality and reckons they are superior to anything he has used before, so much so that he said he would use them on a regular basis. Also a very helpful and friendly company to deal with and they offer a greater range of colours than most. Hmm I might pop round for a look, if that's alright! Link to comment Share on other sites More sharing options...
Rattyjohn Posted November 6, 2016 Share Posted November 6, 2016 14 minutes ago, Crofter said: Hmm I might pop round for a look, if that's alright! That's absolutely fine - if you let me know when, I'll make sure I'm about! Link to comment Share on other sites More sharing options...
Ferdinand Posted November 6, 2016 Share Posted November 6, 2016 TO pick up one other ... Inhave had no issues with overlapping one box or two boxes. And my roof has minimal fall ... about 5-6 degrees iirc. Ferdinand Link to comment Share on other sites More sharing options...
ProDave Posted November 6, 2016 Author Share Posted November 6, 2016 Another question. What happens at the top of a gable end to join the two bargeboard flashings together? I would expect an "end" ridge piece but don't see anything? Link to comment Share on other sites More sharing options...
Crofter Posted November 6, 2016 Share Posted November 6, 2016 I've been wondering about this too. I think I have seen various pieces of metal for this, that match whatever profile ridge you have (e.g. If you have a rolltop one). I think they look a bit 'sheddy' myself and so I am planning on just leaving one barge board intact, and the overlapping one cut plumb, and fixed over the top. Of course that means making good the cut metal using a reasonably well matched paint. Link to comment Share on other sites More sharing options...
tonyshouse Posted November 7, 2016 Share Posted November 7, 2016 barge covers go to top of roof, ridge fits flush to them. Link to comment Share on other sites More sharing options...
ProDave Posted November 7, 2016 Author Share Posted November 7, 2016 8 hours ago, tonyshouse said: barge covers go to top of roof, ridge fits flush to them. This needs a picture of a complete box profile roof showing the gable end. To my mind, the barge covers will meet and overlap partly at the roof pitch, and will look unfinished. Some sort of cover is needed to cover the joint, just as with a tiled rood the end ridge tile has an end on it to hang down and cover the joint. Link to comment Share on other sites More sharing options...
Crofter Posted November 7, 2016 Share Posted November 7, 2016 I suppose in my case I could make up a little diamond shaped piece from larch,matching the cladding, might look quite nice. If I get time today I will have a look at some steel roofs near me and post a few pics. Link to comment Share on other sites More sharing options...
Rattyjohn Posted November 7, 2016 Share Posted November 7, 2016 10 hours ago, ProDave said: To my mind, the barge covers will meet and overlap partly at the roof pitch, and will look unfinished. Some sort of cover is needed to cover the joint, just as with a tiled rood the end ridge tile has an end on it to hang down and cover the joint. That's exactly how it's done on ours, and to be honest it doesn't look that bad. At a glance, the join is hardly noticeable and in my opinion anything placed over it will just look fussy and spoil the clean lines of the roof. If @Crofter hasn't beaten me to it, I'll try and post a pic tomorrow! Link to comment Share on other sites More sharing options...
Ferdinand Posted November 7, 2016 Share Posted November 7, 2016 (edited) On the ridge if you have one, if you make your pitch 45 degrees each side you can use the same L-shaped barge boards for the ridge. Suspect that if you are say 35, 40 or 42 degrees pitch they will just flex elegantly when you screw them down. Simples. Ferdinand Edited November 7, 2016 by Ferdinand Link to comment Share on other sites More sharing options...
ProDave Posted November 7, 2016 Author Share Posted November 7, 2016 It's a low pitch, I haven't measured it, but more like about 20 degrees. Link to comment Share on other sites More sharing options...
Rattyjohn Posted November 8, 2016 Share Posted November 8, 2016 As promised a pic of the barge cover and ridge detail on our roof and one showing the overall look of the sheeting. The ridge cover was specially folded to 120 degrees, the roof pitch being 30 degrees. 1 Link to comment Share on other sites More sharing options...
ProDave Posted November 8, 2016 Author Share Posted November 8, 2016 Thanks for the picture. so you cut one of the verge angles like that I take it? Next question: I assume you can buy a filler piece (foam or something better) to fill in the box sections at the eaves to stop vermin, birds nesting up there etc? (ventilation is already taken care of as it will sit on a vent strip) Link to comment Share on other sites More sharing options...
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