I'm putting in an older stove that's 24 inches wide and it will be 32 inches high. It doesn't have a heat shield, so it looks like my choices are, put it 36 inches from the wall or put up a 96x68 inch shield 1 inch off the wall. Could I make a shell around the top, back and sides of the stove, made of cement board, metal or micore that covers the stove 36 inches out from the wall and directs the heat out away from the wall? Thanks