GrantMcscott Posted February 12 Share Posted February 12 I am putting my hearth in and to is 1800mm x 600mm x 20mm it is raise of the ground by 45mm so there is a space below it. The company that supplied it have stated that I need to bed it on cement but I thought it would be strong enough with out doing this and just setting it in. There is a support underneath where the pink line is in pic Link to comment Share on other sites More sharing options...
BotusBuild Posted February 12 Share Posted February 12 If you really mean there will be a 25mm (45-20) or 45mm airgap underneath, I think you are asking for trouble. A heavy object falling on that and I think it might crack. If you are seeking to see a "gap" at the edges, I would create a wooden form that is easy to remove after pouring a cement base on which this lovely piece of stone will sit. Link to comment Share on other sites More sharing options...
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