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Old 01-04-2008, 11:35 PM   #1
jthoni
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Trowel notch size for 12"x24" tile

I have tiles that are 12" x 24." Am I correct in assuming that I use a 1/2" x 1/2" trowel? Also, I generally find recommendations that state I can use either square or round. What is generally preferred?

thanks!
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Old 01-04-2008, 11:39 PM   #2
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Hi there, gotta first name? I would use the 1/2". I don't think it matters which one though.
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Old 01-07-2008, 06:41 PM   #3
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you may get a bit more thinset with a square trowel...just a thought from some one who's tried putting square pegs into round holes
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Old 01-07-2008, 07:36 PM   #4
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If you can get one of these in the 1/2x1/2x1/2 equivalent, they're pretty sweet.

Otherwise, I vote for the 1/2x1/2 square notch.
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Old 01-07-2008, 08:37 PM   #5
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Love that trowel Greg! It looks pretty futuristic too
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Old 01-07-2008, 09:02 PM   #6
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hd

ive never seen them at my HD or any HD 200 miles radius from here
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Old 01-07-2008, 09:06 PM   #7
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Not at my HD either. Saw them along with some Gundlach tools at a local tile distributor though. I think they even had them in an extra-long trowel.

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Old 01-07-2008, 09:09 PM   #8
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I never have either. I get them at my local tile supplier. They're pretty spendy.
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Old 01-07-2008, 09:22 PM   #9
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spendy

how much spendy , and do they last longer than say marshalltown
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Old 01-07-2008, 10:30 PM   #10
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They run almost thirty bucks apiece. They are a little bigger than a regular trowel, much thicker, and they do last longer.

It is true, you apply much less pressure to achieve good coverage.

Better than a poke inna eye with a sharp stick.
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Old 02-04-2008, 10:30 PM   #11
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Trying to estimate hight of tile after adding in thinset

I have a space inside my french doors that I am tiling. The base of the doors and the ajoining floor are not quite the same height, and I am trying to figure out if I should use 1/4" or 1/2" backerboard.

I have a photo here:


Currently I have 1/4" hardibacker, and tiles that are 3/8" thick. Laying them out with no thinset, I have a gap of 3/8" to the bottom of the door sill, and 3/16" to the hardwood floor.

I will be putting thinset under the hardibacker as well as the tiles (using a 1/2" x 1/2" x 1/2" sq trowel), but I am not sure how thick these layers will be. I am not too concerned if the tile rises up above the floor a bit. In fact, I am using a metal edge up against the wood (is this required?), and if it stood proud enough, I might like to use a transition edge as there are imperfections in the edge of the wood that really stand out when the trim is up against it.

So, should I stay with the 1/4" backer board, or go with 1/2"?

Thanks!
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Old 02-04-2008, 10:34 PM   #12
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I would use the 1/4".
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Old 02-04-2008, 10:36 PM   #13
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I wouldn't use your 1/2" trowel for under the hardi, use 1/4" square notched trowel.
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Old 02-05-2008, 12:21 PM   #14
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Calculate Thinset and Grout

OK, this seems to be a very common question, but I can't find all of the info I need from the other posts. I am trying to calculate the amount of thinset I need. I have a 9' x 3' area. I am using 12" x 24" x 3/8" tiles, with a 1/4" grout gap. I am putting down 1/4" hardibacker on top of plywood. I will be using a 1/2" x 1/2" x 1/2" sq trowel for the tile, and a 1/4" sq trowel for putting down the backerboard.

So, most of the calculators that I have found do not work with non-square tile. Also, they don't add in the thinset needed between the backerboard and the plywood (i.e. there will be two layers of thinset).

Is there any good rule for calculating thinset? I assume I will be using less under the hardi as I am using a smaller notch. Can I make two calculations, multiplying the square footage times some factor based on the notch size, and then add them together to get my total?

How the grout? Is there a grout calculator that will work with 12"x24" tile?

Thanks!
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Old 02-05-2008, 12:24 PM   #15
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Most bags indicate the coverage you get with a particular notched trowel without any other factors being considered. For example, a 50 lb bag of 254 Platinum will yield approximately 80-95 sq ft using a 1/4x1/4 sq notch and 40-45 with a 1/2x1/2 sq notch.
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