FB Board to concrete slab

[ERASMO]

I was searching the forum and was looking for the best material to adhere the FB Board to my already cured precast hearth slab.

[jmhepworth]

Re: FB Board to concrete slab

Just set it there. When the oven is on it, gravity keeps it all in place. No need for any adhesive.

Joe

[ThisOldGarageNJ]

Re: FB Board to concrete slab

unless you have some kind of leveling problem, I agree with joe, the weight of the floor and dome is not gonna let it go anywhere and no need for anything underneath...
cheers
Mark

[dmun]

Re: FB Board to concrete slab

I set my insulating boards (insblock19) into my wet concrete, which isn't a choice for you. If the boards don't sit flat, you can use the fireclay/sand mixture to level them, but as Joe and Mark said, gravity always wins.