I have an exciting fireplace. 4" cement on ground. The walls are cement sheeting. I have correlated roofing on that to height of 3ft in front of that I placed bricks. That has been in Place for 4 years I now have Scandia wood heater which is quite a bit bigger I have to take the bricks away so it fits with right distance. I was thinking if I placed corrugated iron With corrugation placed different direction it would give me a safe distance from wall to fire. It is in a corner thank for any ideas