Flint762

Thanks for all the info folks.

So if I build the forge with a inside measurement of 5 inches wide by 5 inches high and 9 inches deep would work for a single natural aspirated burner. I was thinking of working out from my measurement and I was worried that I would get to much heat lost through only 1 inch of ceramic board that will be treated. For the outer walls I was thinking of 16 ga. sheet metal and I want to be able to take the forge with me when I go camping so if I can keep the weight down all the better but it needs to be safe as to not heat up surroundings. I am new to blacksmithing and have been using a paint can forge but the lining started burning out so this is why I am looking for a new forge and asking all these novice questions.

Flint 

Thanks Frosty. So 1 inch of the fiber broad will be enough insulation if I use 1.25 inch of hard fire brick out side of the board? I am concerned about heat transfer to the out side of the forge

Flint762

When using ceramic fiber board for a forge what is the minimum thickness that it must be? I have a 24 x 18 x 1 inch board and I would like to make a single burner forge. I was going to use a 1.25 thick hard fire brick for the floor of the forge. Can I use the fire brick the back up the board and will the 1 ich board stop heat transfer to the brick and outer walls?

Thanks

Flint762