What size should the grout lines be on a marble tile (12×12) installation, walls & floor in a bathroom?
October 28th, 2009 | by admin |The job is a renovation job in a 20 y/o townhouse. We removed all of the old tile & put new cement board over the old plywood floor. The old sheetrock was ripped out & replaced w/ cement board too. Should the floor be leveled w/ dash patch? My brother-in-law is doing the job & I want to make sure he knows what he is doing. I’ve got no clue.
You can do the tiles in the shower and floor with 1/8" or 1/4" spacers. Use a non-sanded grout so it doesn’t scratch the marble. Don’t use a mastic to apply the tiles. Use a white thinset for the marble tiles and make sure it specifies it can be used on marble. Make sure all seams and corners of the cement board have been taped with fiberglass tape for cement board. You can’t use the tape used for drywall. I thinset my tape in as I’m tiling the walls instead of before. It just makes it easier and no lumps and bumps.
Be sure to seal the marble before grouting so that the grout doesn’t stain the marble.
As far as the cement board on the floor…..I hope thinset was used and that it is screwed down also. Depending on the condition of your wood subfloor and what it is made of you might need 1/2" plywood over it before the 1/4" cement board. The plywood can be installed with construction adhesive.
One Response to “What size should the grout lines be on a marble tile (12×12) installation, walls & floor in a bathroom?”
By chicagirl51 on Oct 28, 2009 | Reply
You can do the tiles in the shower and floor with 1/8" or 1/4" spacers. Use a non-sanded grout so it doesn’t scratch the marble. Don’t use a mastic to apply the tiles. Use a white thinset for the marble tiles and make sure it specifies it can be used on marble. Make sure all seams and corners of the cement board have been taped with fiberglass tape for cement board. You can’t use the tape used for drywall. I thinset my tape in as I’m tiling the walls instead of before. It just makes it easier and no lumps and bumps.
Be sure to seal the marble before grouting so that the grout doesn’t stain the marble.
As far as the cement board on the floor…..I hope thinset was used and that it is screwed down also. Depending on the condition of your wood subfloor and what it is made of you might need 1/2" plywood over it before the 1/4" cement board. The plywood can be installed with construction adhesive.
References :
Just gutted and remodeled my master bathroom.