Home>Discussions>BATHROOMS>how to install marble flooring over raised foundation subfloors?
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californian
how to install marble flooring over raised foundation subfloors?

Hi, we are remodeling in bathroom. We have raised foundation (crawl space), and wood subfloors. What is the best way to install marble flooring? Do we need cement board? And what to use: adhesive/glue or cement? Would appreciate your reply! Thanks.

HoustonRemodeler
Re: how to install marble flooring over raised foundation subfloors?

All natural stone requires a maximum floor deflection of L720. To figure that out you'll need to know your joist spacing, size, and unsupported span. Once you get those numbers, plug them into the handy dandy deflecto-lator over at the John Bridge Tile Forum and see if your joists will handle the marble.

You'll also need a minimum of 1 1/4" of plywood under there. No Sheathing grade, no CDX, no 1/4" plywood.

Yes Ceement board is good to adhere the tiles to. There is also Ditra and Greenskin you can use.

What kind of marble? If green or red marble, you'll need special setting materials. If white (Carrera or Thassos) then white thinset.

californian
Re: how to install marble flooring over raised foundation subfloors?

Thanks, will ask handyman to get under the house and measure.

Sergio Pitts
Re: how to install marble flooring over raised foundation subfloors?

Agree with you... You are saying right.... I have same thinking about it...

HoustonRemodeler wrote:

All natural stone requires a maximum floor deflection of L720. To figure that out you'll need to know your joist spacing, size, and unsupported span. Once you get those numbers, plug them into the handy dandy deflecto-lator over at the John Bridge Tile Forum and see if your joists will handle the marble.

You'll also need a minimum of 1 1/4" of plywood under there. No Sheathing grade, no CDX, no 1/4" plywood.

Yes Ceement board is good to adhere the tiles to. There is also Ditra and Greenskin you can use.

What kind of marble? If green or red marble, you'll need special setting materials. If white (Carrera or Thassos) then white thinset.

Sergio Pitts
Re: how to install marble flooring over raised foundation subfloors?

Agree with you.... You are saying right.... Good thought...

HoustonRemodeler wrote:

All natural stone requires a maximum floor deflection of L720. To figure that out you'll need to know your joist spacing, size, and unsupported span. Once you get those numbers, plug them into the handy dandy deflecto-lator over at the John Bridge Tile Forum and see if your joists will handle the marble.

You'll also need a minimum of 1 1/4" of plywood under there. No Sheathing grade, no CDX, no 1/4" plywood.

Yes Ceement board is good to adhere the tiles to. There is also Ditra and Greenskin you can use.

What kind of marble? If green or red marble, you'll need special setting materials. If white (Carrera or Thassos) then white thinset.

Hclone
Re: how to install marble flooring over raised foundation subfloors?

As we have also done but its wooden raised flooring and everything is managed by my hubby so don't know much about.

But tell you one thing that our men who have done all this are too smart and creative and knowledgeable and thus he has done all perfect exactly what we want so take care of this.

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