Why you use a notched trowel?
William Rodriguez
Published Jan 08, 2026
Used to spread or comb tile adhesive, a notched trowel is an essential tool when tiling; designed to leave notches in the adhesive allowing air to escape when the tile is pressed into it. For spreading levelling compounds, a straight edge trowel can be used.
Why do you need to use a notched trowel?
Square Notched Trowels and U-Notched Trowels
Both shapes create neat rows of ridges with valleys in between them. So, when a tile is carefully set into place, these ridges flatten out and fill the valleys, providing an even coverage to the backside of your tile for a stronger, more complete bond to your wall or floor.
Do you have to use notched trowel for tile?
Tip: The general rule is to use a v-notch for a Mosaic tile and a Square-notch for large format tile. Most average-sized tiles will benefit most from using a U-notch or Square-notch trowel, as the difference in adhesive spread is minimal.
Does trowel notch size matter?
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. U-notched vs.
How much height will thinset add?
When a tile is pressed to this thinset, it spreads to fill the spaces between the ridges, resulting in a thinset layer 3/16ths of an inch thick.
31 related questions foundIs back buttering tile necessary?
Although not necessary for tile coverage, back buttering can be effective by increasing the bond of the mortar to the back of the tile which is an excellent benefit.
What size notched trowel should I use?
Size Matters
All tile manufacturers offer a recommended trowel size. Mosaic installations up to 2 inches can use a 1/8-inch notch, as can wall tiles of up to 4 inches, as a general rule. 16-inch tiles need a 1/2-inch-deep notch, and anything over 24 inches should use a 3/4-inch notch.
How do you choose tile trowel?
Finding the right trowel for the job is quite simple when you know that, generally speaking, the trowel size should match up to the tile size – the smaller the tile, the smaller the trowel; the larger the tile, the larger the trowel.
Whats a margin trowel?
Definition of margin trowel
: a small trowel having a square end for finishing angles and narrow spaces.
What size notched trowel for 12x12 tile?
Trowel Sizes
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.
What size notched trowel for 12x24 tile?
Generally, for the 12×24 inch floor tiles, you should use a square-notched trowel that has either ¼-inch by ½-inch or ½-inch by ½-inch notch. The notch size is vital as it determines the area where the mortar will collapse after installing and pressing down the tiles.
What is a rubber squeegee trowel used for?
Trowel - Rubber squeegee
This trowel is particularly useful to tilers. The pointed blade means the grouting can be forced into angles and around the edges of tiles.
What is trowel used for?
A trowel is a small garden tool which you use for digging small holes or removing weeds. A trowel is a small tool with a flat blade that you use for spreading things such as cement and plaster onto walls and other surfaces.
Do you back butter mosaic tile?
This back-buttering step is best used for all glass mosaic tile, but is essential when using fully transparent tile, in order to keep any remaining trowel lines on the substrate from showing through. Back-buttering also insures near-complete (95%) surface adhesion between tile and substrate.
How do you apply grout?
Apply the Grout
Use a hard-edged rubber grout float, and hold it at a 45-degree angle. Spread the material in sweeping arcs, pressing it into the joints to fill them completely. Work in a small area at a time, roughly a 3- x 3-foot section. Use this method for both pre-mixed and powdered grout.
How do you use a notched trowel?
How is a notched trowel used? While spreading adhesive or thin set with a notched trowel, it's import that the trowel stays in contact with the substrate (wall, floor, etc.) so that the only material left behind is what flows through the notches. This will ensure a consistent application.
Why do you start in the middle when laying tile?
It's always advisable to start tiling your grid in the centre of the wall, as it's easier to make sure your pattern is symmetrical. It also means any half-tiles you may need can go at the end of each row and will be of matching size.
What size notched trowel for 4x8 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'').
How do you trowel thinset?
Trowel the mortar correctly by playing it straight!
Place the tile into the mortar moving it in a back and forth motion perpendicular to the trowel ridges. This movement collapses the trowel ridges into the valleys leaving very few if any voids in the mortar which supports the entire back of the tile.
What does trowel size mean?
Trowels are measured by the length and height or depth of the notches or teeth. A ¼” x ¼” trowel, then, will have a notch that is ¼” square. (See diagram below from What Size Trowel to Use for Tile.) Trowels are measured by the length and height or depth of the notches or teeth.
How do you mix thinset?
Mix water and thinset together.
Using a corded 1/2″ drill with a mixing attachment, mix the water and thinset powder together at a low-speed setting. Continue mixing and moving the drill up and down throughout the bucket to get all of the pockets of thinset.
How soon can you grout after tiling?
Tile adhesive manufacturers typically recommend waiting for one to two full days before you start applying grout. This ensures that the tile won't move while you work and that the seal will remain intact.
Do you need to wet tiles before laying?
Soaking is not necessary. A simple splash, brush, or sponge will do the trick. Any thicker, you will need to not only soak the tile but also let it dry a bit. If your tile is dripping and you place it on top of the adhesive or cement directly, the tile will start slipping.
Can an uneven floor be tiled?
In terms of tiling, an uneven surface can throw up all sorts of problems, distorting the beauty and regimented feel of a flooring project. But there's always hope for righting those wrongs so tiling remains a viable choice. Here, we'd like to present a step-by-step guide for how to tile an uneven floor.