Hi, Currently renovating my home and am about to reinstall the log burner. The previous owners just lined the inside with ordinary plasterboard, I've just bought hardiebacker board as recommended to me. Does anybody have any experience in what sort of plaster I can use to finish this without it cracking? There will be fairly large gap compared to some around up to 120mm on each side and 100mm from the back of the log burner to all walls that will be finished. Appreciate any advice if somebody has had to tackle something similar.