What size are the joists and what unsupported span to they have. How old is the house? It the subfloor OSB or ply?When installing 16 inch ceramic tile, what is the minimum underlayment requirement. I have 3/4 in subfloor over 16 in on center joists. Can I put 1/4 hardibacker down and go? Or do I need additional layers of plywood? Thanx.
Are you sure...6'? That is an odd length.They are 2x8s on about a 6 foot span. The subfloor is plywood, and I stressed minimum meaning minimum height build up. The tile is against carpet, and I dont want to put a big toe stubber in there.
:thumbsup::thumbsup::thumbsup::thumbsup::thumbsup::clap::clap::clap::clap:Are you sure...6'? That is an odd length.
If that is the case, the deflection is ok. However, there is another kind of deflection; the subfloor between the joists. That is why I like to add at least 1/2" EGP, then Ditra.
It is a peeve of mine when floor height is mentioned when talking about tiling. That should be one of the last concerns, not first. No offense to you specifically.
I don't think the 1/2"/Ditra/tile combo is all that tall anyway. It's a smidge more than if your carpet butted to hardwood.
But to answer your question, 1/4" CBU is fine as and underlayment. :sad:
Carpet does suck! :laughing:I agree with Angus, that's my biggest peeve too! You want the floors to be the same height? Then install the same floors in all rooms. Carpet sucks anyway. It's not sanitary and makes you and especially young one sick. Carpet is cheap to start, but over a 20-30 year cycle, ceramic is much cheaper to own.
I disagree with Angus about how much subfloor/underlayment thickness is required though. Although the more the better...:thumbsup: a 3/4" subfloor is plenty stiff enough for ceramic in your case.
And Ditra......Best product in our industry next to Kerdi Membrane and Kerdi Drain. :thumbup: