insulating arch question

[gwcutter10]

I have a homemade arch which was a round 200 gallon fuel barrel. I put a sheet of steel on each side to make a square firbox and made a ramp for the flames to hit the pan. I then put regular brick in against the steel sides. My question is can i put fireboard (cement board) between the steel and the bricks to help insulate it a little more?? Any help is appreciated.

[jkurtz0711]

I have a very similar setup. Mine is a 36" piece of gas pipe that i build removable square sides around. I insulated between the square and round sides with regular unfaced fiberglass insulation and it works great. For what its worth

[gwcutter10]

thanks... my setup is already welded in... i've been using it for 7yrs now... i don't want to cut it out and start over... thanks for the help....

[Middleton Maples]

It will most definitely help keep some heat in as well as protect the bricks from breaking when the steel expands and contacts from the heat.