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I've had this on a project - client wanted a 5m deep rear extension so the pitch is too low for tiles. I spec'd zinc because it looks nice, performs well and is pretty eco friendly as far as metal goes. Local contractors flipped out because "specialist".
Grp with decor profiles to mimic a standing seam metal is a cost saving and will look okay.
I wouldn't personally do plain GRP or any of the membrane products on a pitched roof that you are going to see from the garden - they're fine for flat roofs behind parapets but don't look great. Builders seem to love GRP as I guess its quite easy to do and you can get all the shit from Selco or wherever. Smells super toxic when they do it though.
I guess it depends where you are but you see enough zinc clad back extensions/lofts on the dezeens/gram so there must be contractors that aren't phased by getting a subbie in to do it.
"Aluzinc" is steel coated in an alloy of zinc and aluminium - may be cheaper but not sure.
Rheinzink, VMZinc, Ned Zinc are the main ones
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Sheppz
Anyone got any experience with zinc roofs?
Our current extension plans have a zinc roof specced due to the pitch required.
A number of builders I’m speaking to are someone hesitant as it needs a specialist, zinc is unlikely to be cheap, or get contractors in at the right time.
I have been suggested GRP as an alternative.
Looks like it can be designed to resemble a zinc roof, or be made completely flat.
Should be considerably cheaper.
Any thoughts or suggestions?