When installing a 12×12 floor tile, spreading a thin ¼inch outer layer of mortar makes the back of the tile smooth and even. Hold the trowel at a 90degree angle to spread your thinset evenly across the surface.
On wall installation, it is second to none to prefer a small amount of thinset because they ensure that the tile adheres well.
12by12inch floor the tiles are certified, requiring a 1/4inch by 3/8inch or 1/2inch by 1/2inch grooved trowel, guaranteed by Tile Pro Depot.
If you’re installing that smoothbaked porcelain clay or ceramic tile on a floor or wall, a ¼ X ⅜” square is the best choice for a grooved trowel.
And Keep in mind that floor tiles move around a lot, so you should use a ½ X ½” trowel on most 12×12 tile basement installations.
And for wall installation, you should use a small size ¼ X ⅜” trowel. A ½inch by ½ inchnotched trowel is the best choice for a 12 x 24inch tile.
Overall, it’s best to make sure 85 percent of the room between the tile and the subfloor is covered with adhesive, using a threequarterinch Ushaped trowel. Adhesive coverage is particularly impressive on tile edges and corners.
Also Read: How Many Tiles Do I Need?
Tile Trowel Size Chart
The amount of trowel required for that particular tile depends on the size of the tile, the thickness of the mortar required, and the surface of the pavement.
In general, for that 12×24 inch floor tiles, you should use a squarenotched trowel that has either a ¼inch by ½inch or a ½inch by ½inch notch.
The Tile Trowel Size Chart
3/16” to ¼” VNotch 
Mosaics Tiles Up to 4½” Glazed Wall Tile

¼” U or square notch  4” to 8” tile 
⅜” U or square notch  8” to 16” tile 
½” U or square notch  16” and larger 
The Trowel Size Chart For 12×24 Floor Tile
Notch Size  Dimension  Type 
Recommended Product

Minimum  ¼inch by ½inch  Squarenotched 
MD Building Premium Square Notch Trowel

Maximum  ½inch by ½inch  Squarenotched 
Frosch Stainless Steel Square Notch Tile Trowel

Can I Use 1/4 Trowel for 12×24 Tile?
A trowel with a ½ inch square groove is used for larger tiles. And you’ll also want to use this for tiles about 16 inches and larger.
A ¼” slotted trowel will work well. Flooring tiles: Use a squarenotch or Unotch trowel for each size. ¼” 4″ and 6″ are suitable for these floor tiles.
For 8″ and 12″ floor tiles, you can choose ¼” x ⅜,” and for 12″, the vast and larger floor tiles, ½.” For larger tiles like 24” x 24”, 1/2” x 1/2”, square notch trowel sizes are prime. More petite than 1/8”: Trowels smaller than 1/8” are primarily used for glue, not mortar.
In most cases, a ½inch by ½inch notched trowel is the classic choice for a 12 x 24inch tile. A threequarterinch Ushaped trowel is also used. If your floor and tiles are flat, you may do well with that 1/4″x3/8th” square notched trowel.
Also Read: How Many Cubic Yards in a Ton of Asphalt?
Trowel Size for 12×24 Tile on Ditra
Trowel size for that 12×24 tile on Detra ½ inch x ½ inch square notch trowel. You’ll want to use this for tiles about 16 inches and larger. So, this trowel is a good size for those 12×24 tiles, 16×16’s, 6×24, 8×36, woodlook plank tiles, etc.
The Ditra Trowel is simply a 3/16 x 3/16 square notch trowel. Technically, they are 5/64 x 5/64. The DetraHeat Trowel is a ¼ inch x ¼ inch square notch trowel. This site is used with Ditraheat, Ditraheat Duo, and Ditra XL.
The most common tile mortar is a thin set. When installing porcelain clay tiles 12×24, we recommend using a mediumsized or mastic mortar because it has more soilholding power than a thin set.
What Size Trowel for 4×12 Wall Tile?
The trowel for the 4×12 wall tile was a ¼” x ⅜” square notch. And that trowel is perfect for 8″ x 8″ tiles, as some builders are gridding tiles and larger subway tiles (about 4″ x 12″). For 8″ and 12″ size floor tiles, you need ¼” to ⅜,” and for 12″ wide and larger floor tiles, ½.”
Wall Tiles: For standard 4″ wall tiles, you should use a trowel with a ¼” Vnotch, but if you don’t have access to one, a square or U notch of the same size should do the job. Tools and tips that are used for the entire mortar application and process for that 12×24 tile.
The most common tile mortar is a thin set. When installing porcelain clay tiles 12×24, we recommend using a mediumsized or mastic mortar because it has more soilholding power than a thin set.
½” x ½” square notch. The travel size is great for those big tiles. They interfere with your mortar on the thicker side and apply a ½ inch notched trowel to the subfloor where your tile went.
Mapei Trowel Size Chart
Mapei Trowel Size Chart  
Mosaics and Small Ceramic  Irregular or LugBacked Tiles (Saltillo Pavers) 
Tiles Tile Up to 2″ X 2″ (5 X 5 Cm)  Tile Up to 12″ X 12″ (30 X 30 Cm) 
3/16″ X 5/32″ (5 X 5 Mm) VNotch  1/4″ X 3/8″ (6 X 9.5 Mm) SquareNotch 
Tile Up to 4″ X 4″ (10 X 10 Cm)  
1/4″ X 3/16″ (6 X 5 Mm) VNotch  1/4″ X 3/8″ (6 X 9.5 Mm) UNotch 
Wall Tiles and Floor Tiles Tile Up to 8″ X 8″ (20 X 20 Cm)  Tile Over 12″ X 12″ (30 X 30 Cm) 
Tile Up to 8″ X 8″ (20 X 20 Cm)  
1/4″ X 1/4″ (6 X 6 Mm) SquareNotch  1/4″ X 1/2″ (6 X 13 Mm) UNotch 
1/4″ X 5/16″ (6 X 8 Mm) UNotch  1/2″ X 1/2″ (13 X 13 Mm) SquareNotch 
Tile Up to 12″ X 12″ (30 X 30 Cm)  
1/4″ X 3/8″ (6 X 10 Mm) SquareNotch  
1/4″ X 3/8″ (6 X 9.5 Mm) UNotch 
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What Size Trowel for 12×12 Floor Tile?
Floor tiles measuring 12 by 12 inches are considered standard, requiring a notched trowel size of either 1/4 inch by 3/8 inch or 1/2 inch by 1/2 inch, reveals Tile Pro Depot.
What Size Trowel for 4×12 Wall Tile?
1/4” x 3/8” square notch: this trowel size is good for 8” x 8” tiles, some buildergrade tiles, and bigger subway tiles (around 4” x 12”).
What Size Notched Trowel for 4×12 Wall Tile?
1/4” x 3/8” square notch: this trowel size is good for 8” x 8” tiles, some builder grade tiles, and bigger subway tiles (around 4” x 12”). 1/4” x 1/2” square notch: this trowel size is good for installing 12” x 12” and 13” x 13” tile.
What Size Trowel to Use for 4×12 Wall Tile?
For floor tiles ranging in size between 8″ and 12″, you may want to use a ¼” x ⅜,” and for floor tiles 12″ wide and larger, go with a ½.” Wall tiles: For standard 4″ wall tiles, you should use a ¼” Vnotched trowel, but if you don’t have access to one, the same size in square or U notches should work.
What Size Notched Trowel for 12×12 Tile?
A ¼ inch x ⅜ inch square notch trowel works well for most 12 x 12 tiles (30cm x 30cm).
What Trowel to Use for 12×12 Tile?
Use at least a 3/8”x1/2” notch trowel for 12”x12” tiles and a 1/2”x1/2” notch trowel (or larger) for 16”x16” and 24”x24“ tiles.
What Size Trowel for 12×12 Mosaic Floor Tile?
Small ceramic tiles and mosaics: Use Vnotched trowels on both walls and floors. Use a 3⁄16 ” x 5⁄32″ trowel for square tiles with less than 2″ of width and ¼” x 3⁄16″ for square tiles between 2″ and 4″.
What Size Trowel Should I Use for 12×12 Tile?
As a rule, the larger the tile, the larger the trowel. It is always better to use a larger trowel than you might need for the installation. A little extra thinset beneath a tile is completely acceptable; not enough thinset beneath the tile is not acceptable.
What Size Trowel to Use for 12×12 Floor Tile?
Floor tiles: Use squarenotched or Unotched trowels for all sizes. The ¼” is suitable for 4″ and 6″ floor tiles. For floor tiles ranging in size between 8″ and 12″, you may want to use a ¼” x ⅜,” and for floor tiles, 12″ wide and larger, go with a ½.”
What Size Notched Trowel for 12×12 Floor Tile?
Finding the right trowel for the job is quite simple when you know that, generally speaking, the trowel size should match the tile size – the smaller the tile, the smaller the trowel; the larger the tile, the larger the trowel.
What Size Trowel for 12 X 12 Floor Tile?
If the 12inch porcelain tiles being installed are of uniform shape and size and are roughly 3/8 inch in thickness, a uniform trowel size can be used. A 1/4inch by 3/8inch square notch trowel will provide the right depth of mortar bed to beat a standardsize 12inch porcelain tile.
What Size Trowel for 12×12 Ceramic Floor Tile?
Trowel size of either 1/4 inch by 3/8 inch or 1/2 inch by 1/2 inch.
What Size Trowel for 12×12 Porcelain Tile?
If one of the tiles is fairly flat with minimum warping (cupping), you may meet the proper coverage requirement using a 3/8” squarenotched trowel. If however, the other tile has quite a bit of cupping, you may need to use a larger 1/2” squarenotched tile trowel to get proper coverage.
Tile Trowel Size Chart
As a rule, the larger the tile, the larger the trowel. It is always better to use a larger trowel than you might need for the installation. A little extra thinset beneath a tile is completely acceptable; not enough thinset beneath the tile is not acceptable.
Trowel Size for 12×24 Tile on Ditra
The big ½ inch square notch trowel is used for big tiles. You want to use this for most tiles that are 16 inches and larger. So, this is a good trowel size for 12×24 tiles, 16×16’s, 6×24, 8×36, woodlook plank tiles, etc.
What Size Trowel for 12×24 Floor Tile Over Ditra?
The big ½ inch square notch trowel is used for big tiles. You want to use this for most tiles that are 16 inches and larger.
Trowel Size for Tile on Ditra
For DITRA, use a 1/4″ x 3/16″ (6 mm x 5 mm) Vnotched trowel, 5/16″ x 5/16″ (8 mm x 8 mm) Vnotched trowel, or the DITRA trowel, which features an 11/64″ x 11/64″ (4.5 mm x 4.5 mm) squarenotched design, is recommended.
What Size Trowel for Floor Tile?
As a general rule for which size trowel to use, follow this generic banding: Mosaics/ small format tiles (10x10cm or smaller) – 34.5mm. Small/medium format wall tiles (10×1030x30cm) – 6mm. Large format tiles (20×2030x30cm) – 8mm.
What Size Trowel for 12×24 Floor Tile?
Use squarenotched or Unotched trowels for all sizes. The ¼” is suitable for 4″ and 6″ floor tiles. For floor tiles ranging in size between 8″ and 12″.
What Size Notch Trowel for 12×24 Tile?
You want to use this for most tiles that are 16 inches and larger. So, this is a good trowel size for 12×24 tiles, 16×16’s, 6×24, 8×36, woodlook plank tiles, etc.
What Size Trowel for 6×36 Tile?
A ½ x ½ inch square notch trowel is a good trowel size for 6×36 tile.
What Size Trowel for 12×24 Tile?
Tools and Tips for The Actual Mortar Application Process for 12×24 Tile. As I mentioned before, mix your mortar to be a little bit on the thick side, and use a 1/2inch notched trowel to apply it to the subfloor where you want your tile.
What Size Trowel for Penny Tile Floor?
¼ inch x 3/16 inch Vnotch trowel works well for most pennyround tiles. A 3/16 inch x 3/16 inch square notch trowel (Ditra trowel) works just as well.
What Size Trowel Should I Use for 12×24 Tile?
The Actual Mortar Application Process for 12×24 Tile. As I mentioned before, mix your mortar to be a little bit on the thick side, and use a 1/2inch notched trowel to apply it to the subfloor where you want your tile.
What Size Notched Trowel for 12×24 Floor Tile?
What Size Trowel for Mosaic Floor Tile?
What Trowel for 12×24 Tile?
Mix your mortar to be a little bit on the thick side, and use a 1/2inch notched trowel to apply it to the subfloor where you want your tile.
What Size Notched Trowel for Floor Tiles?
What Size Trowel for 8×8 Floor Tile?
What Size Trowel for 8×8 Floor Tile? 1/4” x 3/8” square notch: this trowel size is good for 8” x 8” tiles, some buildergrade tiles, and bigger subway tiles (around 4” x 12”).