Travertine subfloor requirements

[sgbContractor]

Hi guys. Have a question regarding travertine in a new construction home. My tile setter says it will be fine to lay 16" x 16" travertine tiles over a 3/4" OSB subfloor which is on 16" centers (the joists are 2 x 10 pine). He has spread 1/8" versabond over the subfloor and nailed 1/4" hardibacker down approx every 8 inches. Does this combonation seam adequate enough for Travertine. I am used to having porcelain tiles. Thanks

[Sponsored Links]

[bbcamp]

Well, the subfloor is not good for travertine. It needs to be 1-1/4" thick, not counting the backerboard.

What's the unsupported span of the joists?

[sgbContractor]

Max span is 14 feet. Some areas will have spans of 10 feet.

[bbcamp]

Where the joists are 14 feet, you'll have to either reduce the span with a support beam, or double them.