Supaceil 1.35m x 10mm
Supaceil is a CSR ceiling sheet that can span celing joists at 600mm centres. It is available in widths of 1200mm and 1350mm. Both long edges are recessed.
It is only necessary to use Supaceil on ceilings with 600mm timber spacing, standard 10mm Gyprock is quite adequate for 600mm stud spacing on walls.