NOTCHED & TILING TROWELS
Notched trowels control how tile adhesive goes down, so your tiles sit flat, bond properly, and do not leave you chasing lippage or hollow spots later.
Get the notch wrong and you either starve the tile of adhesive or make a mess that squeezes through every joint. These notched tiling trowels are the ones setters reach for when wall tiling, floor tiling, and laying larger format tiles, with square notch, V notch, and U notch options to match adhesive type and tile size. If you are sorting the rest of the kit, have a look at Trowels, Tiling Tools, Tile Cutters, Tile, Glass & Diamond Drill Bits, and Tile Vibrators while you are at it.
What Are Notched Trowels Used For?
- Spreading tile adhesive evenly across plaster, backer board, screed, and prepared floors so coverage stays consistent and tiles bed down properly.
- Combing straight adhesive ridges for wall tiling, which helps air escape as the tile is pressed in and cuts the risk of hollow spots behind the finished work.
- Laying floor tiles and larger format porcelain where a deeper notch is needed to carry more adhesive and take up slight irregularities in the substrate.
- Matching notch shape and size to the tile and adhesive, whether that means a smaller V notch for mosaics or a larger square notch for heavier floor tiles.
- Back buttering and full-coverage fixing in wet areas, entrances, and high-traffic floors where poor adhesive spread will come back to bite you later.
Choosing the Right Notched Trowel
Sorting the right one is simple: match the notch to the tile size, the adhesive, and the surface. Do not guess and hope it beds in.
1. Match the notch to the tile size
If you are fixing small wall tiles or mosaics, a 3mm or 6mm notch is usually plenty. If you are laying larger wall tiles or standard floor tiles, step up to 8mm or 10mm. For large-format floor tiles, 10mm or 12mm notched trowels are usually the safer bet for proper coverage.
2. Pick the right notch shape
V notch trowels suit smaller tiles and lighter adhesive beds. Square notch trowels are the usual all-round choice for wall and floor tiling because they leave a solid, consistent ridge. U notch trowels are handy when you want a rounder bead and good collapse under bigger tiles.
3. Think about the background
If the wall or floor is dead flat, you can stick closer to the recommended notch size. If the background is a bit off, you may need a deeper notch and back buttering to keep coverage up. A notched trowel will not fix a rough substrate on its own.
4. Do not buy just one size
If you tile regularly, keep at least a small wall tiling trowel and a larger floor tiling trowel in the kit. One size does not cover every job, and using the wrong notch is where most bedding problems start.
Who Uses These on Site?
- Tilers use notched trowels every day because the right notch is what gives proper adhesive coverage on walls, floors, splashbacks, and wet rooms.
- Bathroom and kitchen fitters keep a few sizes in the van for splashbacks, shower enclosures, and porcelain floors where neat adhesive control matters.
- General builders and renovators reach for these on refurbs when they are setting out utility rooms, hallways, and small commercial tiling jobs.
- Flooring and maintenance teams use larger notch tiling trowels for replacement floor tiles and heavier traffic areas where weak bedding is not an option.
Tiling Accessories That Save Time and Snagging
A notched trowel is only part of the job. These extras help you spread cleaner, cut accurately, and bed tiles properly first time.
1. Mixing Paddles and Buckets
Badly mixed adhesive will drag, slump, or skin over too fast, which makes even a decent notched trowel work badly. Get the mix right and the ridges hold their shape properly.
2. Tile Cutters
You can spread adhesive perfectly and still ruin the finish with poor cuts round edges, sockets, or reveals. A proper cutter saves you fighting chipped tiles and ugly end rows.
3. Tile, Glass & Diamond Drill Bits
When pipes, wastes, or fixings need to come through the tile, the right bit stops breakouts and wasted tiles. Worth having before you start, not halfway through the job.
4. Tile Vibrators
On larger format tiles, these help settle the tile into the adhesive ridges and push air out cleanly. That means better contact and less chance of hollow spots under big porcelain.
Choose the Right Notched Trowel for the Job
Use this as a quick guide before you start spreading adhesive.
| Your Job | Notched Trowel Type | Key Features |
|---|---|---|
| Small wall tiles and mosaics | 3mm to 6mm V notch trowel | Lower adhesive build, better control on light tiles, cleaner joints with less squeeze out. |
| Standard ceramic wall tiling | 6mm square notch trowel | Consistent ridges for everyday wall work, good balance of coverage and tidy spread. |
| Porcelain wall tiles and medium floor tiles | 8mm to 10mm square notch trowel | More adhesive carry for heavier tiles and better bedding on bigger formats. |
| Large-format floor tiling | 10mm to 12mm U notch or square notch trowel | Deeper bed, improved ridge collapse, better coverage under wide and heavy tiles. |
| Uneven backgrounds or external style coverage demands | Larger notch with back buttering | Helps achieve fuller contact where flatness is not perfect and voids are a risk. |
Common Buying and Usage Mistakes
- Choosing a notch by eye instead of by tile size is the usual mistake. Too small and you lose adhesive coverage. Too big and you spend the day cleaning squeeze out from joints.
- Using one old trowel for every job causes problems fast. Worn notch edges leave less adhesive than you think, so replace it once the teeth start rounding off.
- Swirling the adhesive instead of combing it in straight lines traps air under the tile. Straight ridges collapse better when the tile is pressed in and give more reliable coverage.
- Trying to fix poor backgrounds with a deeper notch alone is asking for trouble. A notched tiling trowel helps with bedding, but it will not make a badly out of level wall or floor right.
- Skipping back buttering on large-format or tricky tiles can leave hollow spots. If coverage matters, especially on floors and wet areas, spread on the background and the tile where needed.
Square Notch vs V Notch vs U Notch
Square Notch
This is the usual all-rounder for wall tiling trowels and floor tiling trowels. It leaves a solid adhesive ridge, works with most tile sizes, and is the safe choice if you want one type that covers most standard site work.
V Notch
Best for smaller tiles, mosaics, and lighter adhesive beds where you do not want too much squeeze out. It is tidy and controlled, but it is not the one to reach for when tiles get heavier or larger.
U Notch
U notch trowels leave a rounder ridge that can collapse nicely under bigger tiles. They suit larger formats and jobs where fuller bedding matters, but they are usually more trowel than you need for small wall tiles.
Small Notch vs Large Notch
Small notches like 3mm and 6mm are for lighter tiles and neater wall work. Larger 10mm and 12mm notched trowels carry more adhesive for floor tiling and large porcelain, but only if the job genuinely needs it.
Maintenance and Care
Clean Adhesive Off Straight Away
Do not leave adhesive to cure on the blade. Once it hardens, the notch shape is effectively changed and the trowel will not spread properly on the next job.
Check the Notch Edges
The teeth do the real work, so keep an eye on wear. If the points are rounded or chipped, adhesive coverage drops off and your stated notch size means very little.
Store Them Dry
Wash down after use and dry the blade before it goes back in the box. That helps prevent rust, keeps the edge clean, and stops dried adhesive contaminating the next mix.
Keep Handles Sound
A loose or cracked handle makes it harder to keep even pressure through the spread. If the grip starts twisting or working loose, replace the trowel before it starts affecting the finish.
Replace Worn Trowels, Do Not Nurse Them
These are not tools to run into the ground. Once the blade is bent, the notch is worn, or rust is pitting the edge, swap it out. You will save more in avoided snagging than the trowel costs.
Why Shop for Notched Trowels at ITS?
Whether you need a small notched trowel for wall tiles or a bigger adhesive spreader trowel for large-format floor work, we stock the full range. That means square notch trowels, V notch trowels, U notch trowels, and the sizes trades actually use, all in our own warehouse and ready for next day delivery.
Notched Trowel FAQs
What size notched trowel do I need for wall tiles?
For most standard wall tiles, a 6mm square notch trowel is a solid starting point. Smaller ceramics or mosaics often suit a 3mm or 4mm V notch better. The real check is coverage once the tile is pressed in. Lift one now and then and make sure the adhesive is properly bedding out, not just touching the high spots.
What size notched trowel should I use for floor or large-format tiles?
For floor tiles and larger format porcelain, you are usually looking at 8mm, 10mm, or 12mm notched trowels depending on the tile size and how flat the floor is. Big tiles need more adhesive and better coverage, so do not try to get away with a small wall trowel. On larger formats, back buttering is often part of the job too.
What is the difference between square, V and U-notched trowels?
Square notch trowels are the everyday choice because they leave a strong, even ridge for most wall and floor jobs. V notch trowels suit smaller tiles and lighter adhesive beds where neatness matters. U notch trowels leave a rounder ridge that collapses well under larger tiles, so they are often used on bigger floor work and large-format fixing.
Why should tile adhesive be combed in straight lines?
Because straight lines let air escape properly when you press the tile in. Swirled adhesive can trap pockets underneath, which is how you end up with hollow spots and poor contact. Straight combed ridges collapse more evenly and give you a more reliable bed across the tile.
Do I need to apply adhesive to the tile as well as the wall or floor?
Sometimes, yes. For small wall tiles on a flat background, spreading on the wall may be enough. For larger tiles, porcelain, floors, wet areas, or anything where full coverage matters, back buttering the tile as well is the safer way to go. It helps fill slight voids and improves contact across the whole back.
Do worn notches really make that much difference?
Yes, more than most people think. Once the teeth round off, the trowel stops laying down the adhesive depth it says on the tin. That means less coverage, more guesswork, and a higher chance of hollow tiles. If the blade is worn, replace it.
