Temporary Fire Panel for Cooktop

[MasterOfNone]

Hi all,
I just found out it will be approx 4 weeks till i get my glass splash backs for my kitchen, I am trying to get my cert. of occupancy before then. I would like to install a temporary fire proof panel behind the gas cook top, the wall behind it is plaster board (brick vaneer). Does anybody know what i can use to do this? What are the minimum distances it would have to be to satisfy the inspection for cert. of occ.

Thanks for any help, James.

[echnidna]

Ask the building inspector if he will accept a cement sheet one.