What Are The Tips For Choosing The Best Plastering Trowel?

Choosing the right plastering trowel can make all the difference between a flawless finish and a frustrating mess. Whether you’re a seasoned pro or a weekend DIYer, the tools you use can elevate your plastering game—helping you achieve that smooth, even wall or ceiling you’ve been dreaming of. But with so many options out there, picking the perfect trowel can feel like navigating a maze. 

From blade material and handle comfort to trowel size and flexibility, each factor plays a pivotal role in ensuring that your work not only looks professional but feels effortless. Let’s dive into everything you need to know about choosing the best plastering trowel and why it matters more than you might think.

Essential Factors to Consider When Choosing a Plastering Trowel

One of the first lessons I learned in plastering was that size really does matter when it comes to trowels. When I used a large, heavy 16-inch trowel to cover smaller areas, I found it nearly impossible to keep control, and my plastering technique suffered. It wasn’t until I swapped it for a smaller, more manageable 12-inch trowel that I started to feel like I had the reins in my hands.

The size of the trowel affects everything from how much plaster you can spread to how easily you can control the flow and pressure. Choosing the right size makes a world of difference in your work speed, precision, and comfort.

Here’s a simple size guide to help you figure out what will work best for you:

I recommend beginners start with something around 12 to 14 inches. It’s the sweet spot for most applications and will give you the control you need without slowing you down too much.

Choosing the Right Blade Material for Durability

Let’s talk about blade materials. I still remember my first carbon steel trowel, which I had to oil and clean religiously. Carbon steel trowels are excellent for achieving a sharp, clean finish, but they do require a bit more care. It was a learning curve, but once I got into the habit of looking after my tools, the results were phenomenal.

The most common materials for plastering trowels are carbon steel and stainless steel. Here’s a comparison to help you decide which one is right for you:

I’ve found that carbon steel is fantastic for thick plaster and the first couple of coats, but if you’re planning to use the trowel in a humid environment or for fine finishing, stainless steel or golden stainless steel is a better choice. For instance, if you’re in a coastal town like Sydney where the humidity is higher, a stainless steel trowel might be more practical.

Flexibility and Functionality in Plastering Trowels

Now, let’s talk flexibility. I remember being told by a seasoned plasterer that the flexibility of the trowel blade was just as important as the material. And he was right. Using a trowel that’s too stiff for finishing can leave visible marks or streaks in the plaster, while one that’s too flexible might not give you the control you need for a smooth, flat surface.

For example, I started using a flexible trowel for my final coat after a few weeks of frustration with surface marks. The difference was like night and day—smoother finishes and faster completion times. Here’s what you need to know about trowel flexibility:

For professionals, a combination of standard trowels for application and flexible ones for finishing is the key to achieving the best results. This is something I learned quickly—trying to use a flexible trowel for base layers just doesn’t work.

Comfort and Control for Better Performance

When I first started plastering, I didn’t give much thought to the handle, assuming it was just a part of the trowel. But after a full day of plastering, my hands were sore, and I realised how much the handle impacted my comfort and performance. A poor handle can make plastering feel like a chore, whereas a well-designed handle can make the work feel almost effortless.

Handles come in a variety of materials, but some stand out more than others. I’ve worked with wooden handles, rubber grips, and even cork-based handles, and each has its pros and cons. Personally, I’ve found rubberized grips to be my go-to, as they provide both comfort and control, especially during long sessions.

Here are the types of handle materials and what they offer:

When selecting a trowel, look for handles that fit your hand comfortably, with ergonomic designs to help reduce fatigue. After a few hours of work, you’ll notice the difference. Trust me—what seems like a minor detail at first can have a huge impact on your overall experience.

Choosing Trowels with Ergonomic Handles

Ergonomics isn’t just a buzzword—it’s a game changer, especially if you’re plastering for hours at a stretch. I remember a time when I was working on a commercial job, doing plastering in a large room with high ceilings. After hours of using an old trowel with a basic handle, my wrist started to ache. It wasn’t until I switched to a trowel with an ergonomically designed handle that I realised how much easier and more comfortable the work became.

Ergonomically designed handles often feature extra knuckle clearance and curved shapes that naturally fit the hand, making it easier to grip and control the trowel. Some high-end models like the Hanke Pro Ergonomic Trowel are designed with long hours in mind, providing a balance between comfort and control.

Specialised Trowels for Different Plastering Tasks

The shape of the trowel blade plays an essential role in the quality of your finish. I remember the first time I used a Venetian trowel with its trapezoidal shape for a decorative finish—it made a huge difference in the final product. The trowel’s design allowed me to smoothly spread the plaster, and the polished edge left no lines or imperfections, which was crucial for the project.

Depending on the plastering task, you’ll need different shapes:

• Rounded Corners: Ideal for finishing. They ensure that you don’t leave lines or gouges in the wet plaster. These are essential for achieving a flawless, polished surface on final coats.
• Trapezoidal Shape: Best for Venetian plaster applications. This shape works wonders in achieving smooth and even finishes on decorative plaster, especially on interior walls.
• Pre-Worn Blades: These are blades that have been “broken in” before they reach you. Using a pre-worn blade helps prevent imperfections like scratches or marks left during manufacturing.

Each task has its own specific trowel, and using the right one can improve your speed and the final result. Specialty trowels like corner trowels for angles and margin trowels for patching or tight spaces are also important to consider.

The Role of Plastic and Specialty Trowels

While metal trowels are the go-to for most plastering jobs, there’s a growing trend towards plastic trowels for finishing touches. I used to be sceptical about them, but after using a Refina Plaziflex plastic trowel, I was surprised at how well it handled the final smoothing stages. It’s incredibly lightweight, which reduces hand strain during long finishing sessions, and its flexibility makes it ideal for creating a glass-smooth finish on the plaster surface.

That said, plastic trowels aren’t as durable as metal options, so they’re typically reserved for the final stage of plastering when the plaster is drying and needs minimal pressure. For the rest of the job, a sturdy metal trowel is usually best.

Maintaining Your Plastering Trowel for Longevity

If there’s one thing I’ve learned over the years, it’s that proper maintenance of your trowel can extend its life significantly. I can’t count how many times I neglected cleaning my trowels properly after a hard day’s work, only to find the blades coated in dried plaster the next day. The tools that were well taken care of always outperformed the neglected ones, hands down.

Here’s how to keep your trowel in tip-top shape:

• Clean Immediately After Use: Wet plaster dries hard and can ruin your blade if left for too long. Use warm water and a stiff brush to scrub off any residue.
  
  
• Rust Prevention: For carbon steel trowels, wipe the blade with a light layer of oil (I use machine oil) after drying to prevent rust. Stainless steel trowels don’t need as much care but still benefit from regular cleaning.
  
  
• Proper Storage: Don’t leave your trowel in a damp environment. Store it in a dry place, and if you can, hang it up to avoid any accidental blade damage.
  
  

Sharpening and Storage Tips for Durability

Over time, your trowel blade will lose its sharpness, so it’s important to sharpen it occasionally. This can be done with wet/dry sandpaper or a sharpening stone. Keep the edge smooth, especially if you’re working on high-end finishes where every detail counts.

To store your trowel, avoid tossing it into a box with other tools. The blade can get scratched, which can lead to uneven surfaces on your next plaster job. I learned the hard way—now, I wrap my blade in a soft cloth or keep it in a designated tool bag with blade protectors.