Limestone Mantel-How Do I Secure The Metal Fixing Brackets?

[Tj8898]

I am part way through installing a new fireplace. The granite hearth and cast iron backing are in place and I am now trying to install a limestone mantel surround. The surround came with metal wall fixing brackets which I need to first secure to the limestone mantel legs. I have tried several adhesives (no nails, tile adhesive) but none were succesful in securing the brackets to the limestone.
I need to complete this by Christmas eve as I have 3 x kids who are expecting Santa Claus to come down this chimney with an assortment of presents!

Any suggestions on how I can secure the brackets?

Cheers

 

[bobby spray]

When I installed my fireplace I drilled and rawpluged the brackets to the limestone fireplace head. You can use tile cement to secure the fireplace to the wall as well. Kind of belt and braces but I didn't want to take the risk of the fireplace falling down.. it's dam heavy and I have small kids.

 

[Tj8898]

Thanks for the response.
The fireplace surround which I have is in 4 x pieces;
2 x legs
1 cross member
1 x head (sits on the cross member)

The legs are hollow so there is not much surface area to secure to the wall.
I was worried that if I drill the limestone that it would crumble. What do you think?

 

[bobby spray]

If this a 'real' limestone fireplace then there should be no problem drilling into the head. Just don't drill too close to the edge and use a sensible sized drill. It sounds a bit strange to me that the legs are hollow. This would indicate that you might have a "composite" stone fireplace and I have no idea if you can drill into those.