I've always just used thinset to attach granite curbs. I also use the mud to create the pitch, just build up the mud bed on the outside.
That makes a lot of sense on the slope issue. I will do that. So just 100% silicone no need for kerdi fix?angus242 said:You should preslope the curb itself, never use thinset to create a slope. Thinset is not waterproof. Therefore, any moisture that does get under it doesn't have a slope to pitch it towards the drain. To pitch a Kerdi curb, I just put a slight tilt on my table saw and run the foam through. Yes it's messy but for that 30 second task, you are done. To adhere the granite to a membrane, put a skim coat of thinset on the curb, let it dry and silicone the stone to the curb.
Sounds good. Silicone it is.angus242 said:Kerdi-Fix is badass, no doubt. I'm just not 100% sure what it will do to the stone (will it seep in and stain?) Just go with what the stone installers use on millions of successful installations. Most important is to preslope your curb BEFORE you add any waterproofing, skim coats, etc.
why wouldn't you just use thinset? Would you use silicone to install granite tiles?
I use thinset for granite marble and quartz curbs. works fine