New here to this forum although i gathered a lot of valuable information here. So here it goes. Decided to ditch my old preway manufactured fireplace- 8 inch flue and install an appy 32bw insert instead. But as always there is a safety issue. The fireplace is a faux brick on top of sheetrock on top on wood studs and the hearth is a brick paver on a wood platform . 8 inch double lined galvanized pipe. So, should i tear it all out and start anew, go with a zc insert like a nappyz26 or reinforce what i have