Cav wrote:Not come across any over timber (I presume you mean laying the ply first?).
The only stuff I've experience with is loud and hot AF! It also isn't very secure against thieves which is why it's commonly only used on warehouse roofs which are 3+ stories high.
By timber I mean the framing, we don't lay ply at all for roofing... a picture is a 1000 words so...
As for hot, we use insulation, and it get's a damn sight hotter here! My home has this as roofing. Security against thieves is a different point altogether, and something that is not actually a huge consideration for us compared to you guys it seems.
This is pretty a standard roofing system here in Aussie and NZ, the next most common option is tiles, which is known to be more vulnerable to break in's (as they are easily lifted) but do cause less heat build up.