In article ,
David wrote:
We have a powder coated steel roof on our house extension (specialist
roofing from Tata Steel) but this is designed to look like a zinc roof.
It is a number of sheets with crimped joints. Looks pretty good.

It isn't particularly noisy in heavy rain because it is laid on wooden
sheets (can't now remember if they were OSB or chip board) designed for
roofing.

Under that is a significant amount of Celotex (or similar) to modern
building regs.

Yes - that's unlikely to be much different to a felt roof as the mass of
the board stops it resonating as well as attenuating the noise. As will
the plasterboard ceiling.

Steel sheets with no boarding are likely a different matter.

--
*Work is for people who don't know how to fish.

Dave Plowman London SW
To e-mail, change noise into sound.