I recently installed a multifuel stove. I knocked out the chimmney breast and set my stove in the bottom of the chimmney breast. I dry lined the back and surrounding areas and within a month or 2 the plaster started to craze and crack due to the intense heat. I now realise that i should of maybe made the opening bigger to allow the heat to escape a bit easier but it is a little late now to alter the building work. Are there any suggestions on what i could do . Is plasterboard worse or better than old fashioned browning/bonding then skimming or is there a better way for the plaster to stand up to the heat.