Is it a matter of scale whe you consider profile sheet? The large profiles would look out of proportion on small roof. They are intended for big industrial units rather than buildings the size of a houses. The standing seam roofs would probably look more "in scale" to domestic applications. If the sheets are continuous you won't get the cut edge corrosion issue I see on most surveys I do on big box section roofs.
What about smaller scale stuff like Decra?

I am planning on DIY. Interesting you have a Vieo roof. This was my first port of call, but since i have been looking at the shed roof i have realised there may be some alternatives.

Did you fit the Vieo roof ? How is it attached to the roof timbers ?

My extension roof will be 6.5m wide x 6m.

I will have a look at Decra.

Not sure about the warranty and the underlay i will use will be the same material i wrap the walls in, so a breathable one.

Posted By: Fred56If the sheets are continuous you won't get the cut edge corrosion issue I see on most surveys I do on big box section roofs.
What about smaller scale stuff like Decra?

Cant comment on anything but the profile sheets from Cladco. I have been using their sheets for 15 years or so and not had any cut edge corrosion that's drawn attention to itself. It's only on our barns but couldn't fault it.

Wish our local planning would have let us use it on our barn conversion. Ended up with 3000 slates from Brazil which which took weeks to instal when 44 profile sheets from just up the road and couple of days work and it would have been done.

Posted By: marsadayYes on the metal roof condensation will occur. So on my shed roof, i thought to lay the tyvek stuff over my osb sheets. Then the metal goes over and just screws into the deck. No one at the supplier has mentioned a special membrane to use.

I think I would contrive a gap between the metal roof and the membrane for ease of drainage otherwise water will be held where the metal and the membrane touch. (counter battens of some sort come to mind)

Yes talking about the shed roof, so corrugated.

So i think my tyvek sheet over the osb board is a winner.

With regards to the extension roof i need to do some more reading on the other Vieo product.

Thanks for input Tom.

I spoke to cladco but because they are in Devon their transport cost is almost the same as the product cost. So i have to find someone up here in Yorkshire.

It seems really easy to fit as well and i am going to be using a similar product on my shed as a test and then next summer i will be getting the roof on my extension.

Here is a pic of the extension so far. I have stopped now as i would need to take off the roof and back patio doors to get it all in and so am waiting now until the spring to start again.

The house is 1910 and i am doing reclaimed brick with lime mortar. Was thinking about a fibre glass roof, but i think metal is a better option now. The pitch is going to be about 12 degrees, but i want to be able to stand on it to service the gutters above. The snow stopper needs to be renewed and so i will be doing this after the extension is finished.

Still doing lots of research. The Planning dev rights say i have to build the extension in similar materials. So i hope a metal roof will be acceptable.

I will be having about 4 x fixed roof lights near the back of the roof to get light into the house.

Interesting about the screw points leaking. Puts me off using this for the extension, but the shed will be ok i think.

on my house they leak, originally each screw had a rubber flange that holds a rubber cap to keep the screw covered, over time many of the screw caps have simply gone and the flanges have cracked. I'm also in a fairly sheltered location. In the past I built one of those metal sheet garden sheds in England, this had plastic sealing washers under the screws, in the 1st year I had to fix scores of them which were dripping water inside. So in my mind any penetration through the sheet is a risk, especially when it will be difficult to detect leaks at a later time ( the problem with adding roof insulation ).

With the current heavy clay tiles I had 2 tiny holes in the middle of tiles, sort of 1/2 pence size if you remember them. I don't know how they got there, quality problems, ice, birds pecking on the roof?? But one of these holes went unfixed by the previous owner and destroyed several sqm of floor and a couple of beams, it was hidden behind part of the roof frame. But with decent eyesight it's quite easy to find these things now. Later there will be boarding top/bottom, between rafter insulation and then a top insulation panel, so they will be impossible to find from the inside and almost impossible to find outside too.. hence the thoughts to metal.. or maybe there is a reason why we use slate in the UK, could that be the answer?

Re corrosion on cut edges of profile sheet - could be caused by cutting with abrasive disc, which burns off galvanising back from the cut edge and prevents the protective galvanic action that would protect the steel from rusting. Manufacturers warn against this, but...

Re leaks on corrugated sheet I have loads of agricultural 6in roofing and some 3in, all at least 45yrs old and have had no trouble at all of this kind despite my tender loving neglect for the last 25 yrs. Sounds like Silky's troubles were due to poor quality seals, perhaps imported from some distant land in a hurry to industrialise 30 yrs or so ago. Galvanised fastenings aren't always what they used to be either - even though hot dipped they manage to spin off most of the zinc so the result is hardly better sometimes than zinc electroplating.

Well, a railscreen over a copiously through-ventilated void over breather felt on board can afford to leak a bit! That system's got to deal with sometimes large amounts of condensate anyway.