Can anyone please assist me with what I can use as a substitute for 1/16″
asbestos insulation specified as a firebox liner in an old LBSC design of dry firebox. I have ceramic fibre insulation but I really need something that will hold its shape and can be fixed by drilling/screwing or rivetting. Googling brings up 3mm underfloor insulation but I have no clue as to whethet this will be suitable.
All suggestions will be gratefully received.