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Old 05-27-2013, 09:38 AM   #1
Join Date: Dec 2007
Posts: 72
What size trowel to use for 6x24 porcelain?

I was thinking 1/4 by 3/8ths.

Maybe 1/2 by 1/2? Is that overkill?

I like Ultraflex 3 for floors. Is that overkill or worth the extra money for peace of mind?

Maybe Ultraflex 2??

The deflecto checks out and we are going over two layers of 3/4 ply and half inch of Durarock set in custom brand thinset. Should make for a sturdy floor but I'm the paranoid type.

What do you pros like to use on porcelain floor?
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Old 05-27-2013, 11:40 AM   #2
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Location: Rochester NY
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Hi Eric!
Half by half notch will work for you. Wouldnt go any less than 3/8"x3/8" Give the backs of the tile a thinset skim coat(flat side of the trowel.Like buttering bread) before you set the tile. You are insuring a good bond that way.

A good modified thinset is what you want. I personally like Laticrete 253 Gold.
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Old 05-27-2013, 03:00 PM   #3
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Location: Boerne, Texas
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Eric, don't get caught up in worrying about the notch size of your trowel, and keep your eye on the goal of achieving as close as possible to 100 percent coverage on the back of each tile with a minimum thickness of 3/32nds of an inch when they're set. The absolute minimum requirement under industry standards is 80 percent coverage with good coverage under all edges and corners.

If your tiles are flat, and your substrate is flat, your 1/4"x3/8ths" notch might be more than adequate. You'll wanna be keying in mortar to the back of each tile anyway, and that will help. If you can't get the required coverage with what you've got, you might need to adjust your technique or your trowel, or both.

The coverage is what's important, not what you used to get it.

My opinion; worth price charged.

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Old 05-27-2013, 03:38 PM   #4
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Location: Princeton,Tx.- Dallas area
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Hi Eric, especially check the center of the tiles. The long tiles tend to be cupped and you may have good thinset coverage on the ends and skimpy in the center. You may have to add a little in the middle of the tiles.

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