A margin trowel is a small rectangular hand trowel used to scoop, mix, spread, and clean up mortar, thinset, grout, and other masonry or tile-setting materials.
It is one of those tools that does not look exciting, but once you start working with tile, concrete patch, mortar, or grout, you realize why pros keep one nearby. A margin trowel is especially useful in tight spaces where a full-size trowel is too wide or awkward.
How a Margin Trowel Works
A margin trowel has a narrow metal blade and a handle. The blade is usually about 5 to 6 inches long and roughly 2 inches wide.
The narrow shape lets you:
- Scoop material out of a bucket
- Scrape the sides of a bucket
- Mix small batches by hand
- Spread thinset in tight areas
- Back-butter small tile pieces
- Clean mortar or grout off tools
- Work in corners, edges, and awkward spots
A margin trowel does not replace a notched trowel for setting most tile. It is more of a helper tool that makes the rest of the job cleaner and easier.
What a Margin Trowel Is Used For
Use a margin trowel for:
- Mixing small amounts of thinset or grout
- Scooping thinset from a bucket onto the floor or wall
- Back-buttering tiles
- Applying mortar in corners or along edges
- Scraping leftover thinset from a bucket
- Cleaning excess material off a notched trowel
- Patching small masonry or concrete areas
- Working around pipes, cabinets, corners, and tight spaces
For tile work, a margin trowel often works side-by-side with a notched trowel. The margin trowel gets material where it needs to go. The notched trowel controls the final mortar thickness.
How to Choose a Margin Trowel
Standard flat margin trowel
This is the most common type. It has a flat, rectangular blade with no notches.
Best for:
- Scooping
- Mixing
- Back-buttering
- Scraping buckets
- Small repairs
This is the one most homeowners should buy first.
Notched margin trowel
A notched margin trowel has small notches along one or more edges.
Best for:
- Spreading adhesive in tight spaces
- Small tile repairs
- Edges and corners
- Areas where a full-size notched trowel will not fit
It is handy, but not as versatile as a standard flat margin trowel.
Pointing trowel
A pointing trowel is triangular rather than rectangular. It is often used for brick, masonry, and mortar joints.
Best for:
- Masonry repairs
- Brick pointing
- Mortar joints
- Concrete patching
A pointing trowel is related, but it is not the same as a margin trowel.
Margin Trowel vs Notched Trowel
| Tool | Main Job | Best For |
|---|---|---|
| Margin trowel | Scooping, mixing, spreading in tight areas | Buckets, corners, back-buttering, small repairs |
| Notched trowel | Creating even mortar ridges | Setting tile on floors and walls |
| Grout float | Packing grout into joints | Grouting tile after installation |
For most tile jobs, you want both a margin trowel and a notched trowel.
How to Use a Margin Trowel
For tile work
- Mix or stir your thinset or grout.
- Use the margin trowel to scrape the sides and bottom of the bucket.
- Scoop material onto your notched trowel or directly onto the surface.
- Use the margin trowel to back-butter small tiles or edge pieces.
- Clean extra material from corners before it hardens.
For small repairs
- Load a small amount of material on the trowel.
- Press it into the crack, joint, or patch area.
- Smooth the surface with the flat blade.
- Clean the edges before the material sets.
Common Mistakes
Trying to set a whole floor with a margin trowel
A margin trowel is too small for full tile coverage. Use the correct notched trowel for the tile size.
Letting thinset harden on it
Clean it often. Dried thinset is much harder to remove.
Using a flimsy blade
A cheap, flexible blade can bend when scooping thicker mortar.
Using it instead of a mixing paddle for large batches
A margin trowel is fine for small amounts. For a full bucket of thinset, use a mixing paddle and proper drill or mixer.
Recommendations
Overall DIY Recommendation
Use a 5-inch x 2-inch flat margin trowel.
Best for:
- Tile repairs
- Bathroom projects
- Mixing small batches
- Back-buttering
- Bucket cleanup
This is the most useful size for homeowners.
Best Value Recommendation
Look for a margin trowel with:
- A comfortable handle
- A stiff carbon steel or stainless steel blade
- A one-piece forged blade/tang if possible
- A blade that feels solid, not flimsy
Prosumer Recommendation
If you do tile work regularly, keep both:
- A flat margin trowel for scooping and cleanup
- A notched margin trowel for tight-space adhesive work
The pair is inexpensive and solves a lot of small tile-setting problems.
Fixers Club Tip
A margin trowel is one of the best “small helper tools” to buy before a tile project. It will not make the final ridges like a notched trowel, but it will make mixing, scooping, back-buttering, and cleanup much easier.
Related Tool Pages
- What Is a Notched Trowel?
- What Is a Grout Float?
- What Is a Mixing Paddle?
- What Is a Wet Saw?