If I build an extension flat roof on a slab floor, what would be a recommended roof insulation setup? The room size would be around 6.0m x 7.0m with the fall down the 6.0m length.

Ceiling would be plaster. The flat roof would have to have maybe flat trusses to hold it up, and there could be batts placed in that cavity? The roofing material would be Colorbond corrugated sheet, with Sisalation underneath.

Just thinking out loud at the moment.


Read the full thread at RenovateForum.com...