[BlueBSH]

I am putting in a built in electic fireplace (39" wide one) and we are going to do a granite facing, with that comes a 1ft wide by 66" long granite hearth...

The floor is a granite slab, do you still need to put a micore board under this, or can granite be placed right onto concrete with no problems?

 

[joecaption]

Right on the concrete is the way to go.

 

[BlueBSH]

Right on the concrete is the way to go.

that's what my original plan was until I got the instructions with the granite facing kit and it says "use micore board on concrete slab to stabalize granite hearth" how much more stable then concrete can you get? I was thinking this is a misprint and that should of been for a wood subfloor?

 

[DannyT]

i would follow the manufacturers installation instructions or your warranty will be null and void.