Best Sliding Mitre Saw for Decking: 2025 Expert Review
DR Joinery
Expert Joiner & Timber Specialist
Building a deck is one of the most rewarding garden projects, but it demands a saw capable of handling wide boards and heavy timbers. A standard 'chop saw' simply won't cut it—literally. Contemporary decking boards, often 145mm or 150mm wide, require the cross-cut capacity of a sliding mitre saw to ensure clean, square ends.
In York, where we often work with pressure-treated softwood or dense hardwoods like Oak and Balau to combat the damp climate, the saw needs enough torque to power through wet timber without stalling. Nothing looks worse than a deck with ragged cuts or gaps where mitres don't meet because the saw wasn't true.
In this review, I've analysed three sliding mitre saws that suit different needs: a solid budget option for the weekend DIYer, a professional-grade Makita for serious joinery, and a clever multi-material saw that handles reclaimed timber with ease.
Live in York?
Planning a new deck but unsure about the groundwork?
Get a free quote for professional design and installation.
Specs vs. The Real World
The Spec: "Laser Guide Accuracy"
"Marketing suggests the laser line indicates exactly where the blade will cut every time."
On site, especially outdoors in bright daylight, lasers can act faint or drift slightly. Always trust your pencil mark and bring the blade down (powered off) to check alignment before cutting expensive hardwood.
The Spec: "Cutting Capacity"
"Saws claim massive cross-cut capabilities in ideal conditions."
When cutting wet, pressure-treated structural timber, the motor load increases significantly. Clean blades are essential; resin build-up from softwood will slow down even the best saw.
My Top 3 Recommendations
Three options to cover different needs and budgets
JCB 254mm Sliding Mitre Saw with Laser Guide & Dust Collection Feature
JCB
For homeowners looking to tackle a garden deck without spending a fortune, this JCB unit offers exceptional value. The 254mm (10-inch) blade provides ample depth for decking joists, and the sliding function easily covers standard 150mm wide deck boards. It's a robust entry-level tool that handles softwood framing competently.
The Good
- High power 2000W motor copes well with pressure-treated timber
- Includes a 60-tooth blade for finer finishing cuts
- 3-year warranty offers good peace of mind for a budget tool
The Bad
- Dust collection bag is basic; expect some sawdust escape
- Plastic components on the guard feel less robust than premium brands
Installer Tip:
The 60-tooth blade provided is great for a fine finish on the decking boards themselves, but if you are cutting thick, wet structural joists, it might cut slowly. Take your time and let the saw do the work to avoid burning the wood.
Priced at £159.99 at the time of writing
Check Price on AmazonMakita LS1219L/2 240V 305mm Slide Compound Mitre Saw with Laser Guide
Makita
This is the saw you'll see in the back of most professional joiners' vans in York. The Makita LS1219L uses a unique forward-rail design, meaning you can place it right against a wall—a massive advantage in tight workshops or cramped garden corners. With a huge 305mm blade, it cuts through large newel posts and structural timber effortlessly.
The Good
- Rail system allows flush-to-wall placement (space-saving)
- Deep cutting capacity handles large structural timbers and newel posts
- Exceptionally smooth sliding action ensures precise mitres
The Bad
- Significantly heavier than smaller models
- High price point for one-off projects
Installer Tip:
The DXT technology allows for very deep cuts near the fence. This is invaluable when cutting skirting or tall fascia boards for the side of your decking. Always keep the slide rails lubricated and free of sap for that 'gliding' feel.
Priced at £749.98 at the time of writing
Check Price on AmazonEvolution Power Tools R255SMS-DB+ Double Bevel Sliding Mitre Saw (110V)
Evolution Power Tools
This Evolution saw is unique because of its multi-material blade, which can cut through wood with embedded nails. If you are repairing an old deck or using reclaimed timber, this is a lifesaver, as hitting a hidden nail won't destroy the blade. **Note:** This specific model is 110V, meaning it requires a transformer (common on UK building sites for safety).
The Good
- Cuts wood with embedded nails – perfect for renovation/reclaimed timber
- Double bevel allows tilting both left and right for complex angles
- Includes a 'Pro Pack' with clamps and extra dust bags
The Bad
- 110V plug requires a site transformer (not standard UK 3-pin plug)
- Slightly noisier than dedicated wood saws due to blade design
Installer Tip:
If you plan to use this on a regular UK mains socket, ensure you have a yellow 110V site transformer. The multi-material blade is fantastic, but don't force it; let the blade rotation do the cutting, especially if you suspect there are nails in the timber.
Priced at £309.00 at the time of writing
Check Price on AmazonFrequently Asked Questions
Why do I need a sliding mitre saw for decking?
Can I leave my mitre saw outside during the project?
What is the best blade for cutting decking?
Do I need a 110V or 240V saw?
Need Professional Timber Decking & Fencing?
Our team at DR Joinery specialises in Timber Decking & Fencing across York.
Get a free quote for professional installation.
View Our Timber Decking & Fencing Service