Thinset used for thick voids?

[Tileisgreat]

Im preping a kitchen w/ backer for a future install and had a 1/2in void over a 3ft span. I thickened the thinset in that void and after the backer was down I screed and flashed it w/ more thinset never exceeding 1/4 in thickness. Is this ok? I assume the fresh thinset will adhere to the dry thinset I used over the cbu.

[Houston Remodeler]

For a BS installation that will work just fine. I wouldn't do it for floors as most thinsets have a maximum working depth of 1/4". For depths over 1/4" a medium set would work very well.

You also could have used 'hot mud' which is the powdered drywall compound. You can find it where it sets up in 90, 45, or 20 minutes.

[Levi the Tile Guy]

Originally Posted by Paul

You also could have used 'hot mud' which is the powdered drywall compound. You can find it where it sets up in 90, 45, or 20 minutes.

Hot mud on a floor Paul? I wouldn't go there. I don't know the specs but I am not thinking it would have much compressive strength, plus it is water soluble.

[Houston Remodeler]

Oh I thought this was a backsplash. Its not? nevermind about the hot mud then.

[jondon]

I saw Paul put "BS installation," I thought he meant b$ll$hit installation, see what you did. I thought maybe you were in a bad mood and hadn't had your morning jolt yet

I can see though as it isn't 100% clear on the application.

[cx]

Welcome, Justin.

I can't see that it is/is not a backsplash, Paul. OP just said kitchen.

Thinset mortar is still not the material of choice for flattening/leveling according to industry standards and manufacturers' recommendations, though.

My opinion; worth price charged.

[Hank B.]

I think you will be fine so long a you let it dry between applications, the floor is solid and you used a quality thinset.

[Houston Remodeler]

Jon,

I had thought about adding an asterisk * when I typed in BS. I guess I should have. I'll fetch another cup of coffee.

[Tileisgreat]

Yes this is over a floor that is very solid. So as long as it dries yall think its ok? Next time Ill use medium since it holds up better to thicker applications.

[Levi the Tile Guy]

The problem with using thinset on a area that big and depth is that the thinset is probably going to shrink and possibly crack. If it is your home and you already attempted it you may be o.k. but definitely let it fully cure before you cover it.

[HomeDepotAssociate]

I saw Paul put "BS installation," I thought he meant b$**$***installation, see what you did.

I thought the same thing!

[Hank B.]

What kind of thinset did you use?

[Tileisgreat]

I used mapei ultra flex 2