Looking for some help.....have just moved in and are planing on reinstalling the gas fire with a marble back panel and wooden surround after it being fully removed by the original owner (I'll use a gas fitter will do the fire install) however I cant figure out how to secure the marble back panel to the wall - the wall is plasterboard covering breeze block and as such cant imagine any adhesive would be suitable given the weight but then I haven't a clue as to what brackets I could use or even how. Any help greatly received!