Looking back to last year , we did this copper roof in spencer place , new lantern installed to roof ,there was a steel beam structure installed to accommodate new lantern, we then installed traditional copper roof to the new built up roof.

We managed to ventilate at eave , ridge and upstand by adding new tapered firring pieces and 5×1 sarking timber to form new deck for copper to be installed , also did a drawing of the detail around one of the concrete pads that the steel structure rested on.

And it turned out exactly how I had drawn it, I love when a plan comes together