When building a retaining wall, you’ll likely need to cut a few blocks to fit corners, curves, or capstones. Cutting retaining wall blocks might sound intimidating, but with the right tools and a few proven techniques, it’s a project any DIYer can handle. We’re here to help you learn how to cut retaining wall blocks.
Whether you’re using Murata™, Chateau Moderna™, or NurseryStone® blocks from Western Interlock, here are the best DIY-friendly methods for getting clean, safe, and accurate cuts without needing a contractor.
1. Hammer and Chisel: Simple and Low-Tech
The hammer and chisel method is a great starting point if you only need to cut a few blocks and prefer to avoid power tools. It’s affordable, quiet, and perfect for a natural, split-face look that blends well with textured wall blocks.
How to Do It:
- Mark your cut line all the way around the block.
- Score the line with a masonry chisel and hammer by tapping lightly.
- Split the block by delivering a firm strike along the scored groove.
- Clean up rough edges with your chisel if needed.
Pro Tips:
- Stabilize the block on a firm surface.
- Take your time scoring; clean cuts come from patience.
- Practice on a scrap block to get a feel for it.
Best for: One-off cuts and rustic finishes.
2. Block Splitter (Guillotine): Fast and Dust-Free
A manual block splitter, also called a guillotine cutter, applies even pressure across the block to give you a straight break, fast. It’s a go-to tool for professionals and a top choice for DIYers tackling more than just a couple of cuts.
How to Use It:
- Mark your cut, then position the block under the splitter blade.
- Align carefully and pull the lever to split.
- Clean the edge if needed.
Why You’ll Love It:
- Zero dust and minimal noise.
- Cuts in seconds.
- Delivers a cleaner break than a hammer and chisel.
Best for: Medium-sized projects where speed matters.
3. Circular Saw with Diamond Blade: Precision for Small Projects
Already have a circular saw? Add a diamond-tipped masonry blade, and you’re ready to cut retaining wall blocks with clean, straight edges. It’s ideal when accuracy matters, like fitting pieces into tight spaces.
How to Use It:
- Equip your saw with a diamond masonry blade.
- Mark your cut and score the line first if possible.
- Saw slowly, letting the blade do the work.
- Flip and cut both sides for thick blocks, then break.
Keep in Mind:
- Always wear a respirator—dry cutting creates harmful silica dust.
- Use water if possible to reduce dust and extend blade life.
- This method is slow and messy, but effective for precision.
Best for: Occasional detail cuts or minor adjustments.
4. Demolition Saw: The Pro Solution for Bigger Projects
Nothing beats a masonry saw for large-scale jobs or when you want perfect cuts every time. Whether a handheld demo or a table-style wet saw, these tools are designed to handle concrete quickly, cleanly, and with precision.
Using a Demolition Saw:
- Rent the right saw for your project (gas-powered or electric).
- Set up water or dust collection, depending on the type.
- Mark your cut, secure the block, and saw slowly through.
- Clean up slurry or dust after cutting.
Why It’s Worth It:
- Cuts thick blocks in one pass.
- Great for angled or mitered cuts.
- Ideal when cutting dozens of blocks.
Best for: Large walls, curved designs, or when quality matters.
How to Cut Retaining Wall Blocks: Choosing the Right Method
Here’s a quick guide to help you decide:
| Method | Best For | Pros | Cons |
|---|---|---|---|
| Hammer & Chisel | 1–3 cuts, rustic look | No power needed, quiet, inexpensive | Slow, not precise |
| Block Splitter | Dozens of straight cuts | Fast, clean, dust-free | Rough finish, limited to straight cuts |
| Circular Saw | Small jobs, clean edges | Accurate, DIY-friendly | Dusty, slow, blade wear |
| Cost, noise, and setup time | Big projects, perfect cuts | Fast, clean, professional results | Cost, noise, setup time |
Safety First
No matter which method you choose:
- Wear eye protection—flying chips happen.
- Use a dust mask or respirator when cutting dry.
- Keep hands clear and blocks stable.
- Wear gloves and hearing protection when needed.
Ready to start your retaining wall project?
Cutting retaining wall blocks doesn’t have to be difficult. With the right approach and tools, you can achieve clean cuts that help your wall fit together beautifully. Whether you’re building a garden border or a multi-tier retaining wall, these methods will help you confidently get the job done.
If you’re planning a repair or starting a new project, Western Interlock offers a wide selection of premium retaining wall blocks to help you achieve professional results. Check out our selection of retaining wall blocks to find the perfect match for your space, and explore DIY with WI for step-by-step hardscape tutorials and pro tips
