Hi

I have an open fire, hole in the wall style with marble surround, and
want to clad the chimney breast in 9.5mm plasterboard and attach with
gripfill. I have had confirmation from laybond that gripfill is
suitable for the task.

Do i have to use any particular plasterboard? i.e. fireproofed or
similar? The chimney isnt lined.

Cheers