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Cutting Trespa: How to Cut HPL Panels Cleanly Without Damage
You cut Trespa and other HPL panels (High Pressure Laminate) with a circular saw or jigsaw fitted with a sharp, fine-toothed carbide-tipped blade. On a circular saw, use an alternate top bevel or triple-chip blade and cut along a guide.
When cutting Trespa, let the saw do the work, protect the decorative face and finish the edges after cutting.
What will you learn in this article?
- What is Trespa and why does it need a different approach?
- Which saw can you use to cut Trespa?
- Cutting Trespa with a circular saw
- Cutting Trespa with a jigsaw
- How do you protect the panel while cutting?
- Drilling holes in Trespa
- Finishing Trespa edges
- Cutting Trespa yourself or having it cut?
- Cutting Trespa safely
- Common mistakes when cutting Trespa
- Frequently asked questions about cutting Trespa
- In short: cutting Trespa
What is Trespa and why does it need a different approach?
Trespa is a brand name for HPL panels: layers of wood fibre or paper with resin, pressed together under high pressure and temperature. The material is very hard, dimensionally stable and resistant to weather and moisture. You see it as wall cladding, fascia boards, balcony screens, tabletops and worktops. Its hardness is comparable to hardwood, but the resin blunts saw blades faster than wood does. With an ordinary wood blade you quickly end up with a ragged edge and an overheated blade.
Which saw can you use to cut Trespa?
| Saw | Use | Blade |
|---|---|---|
| Circular saw with guide rail | Long, straight cuts | Carbide-tipped, alternate top bevel or triple-chip |
| Table saw | Straight cuts in smaller panels | Carbide-tipped, triple-chip |
| Jigsaw | Curves, cut-outs, short cuts | Carbide-tipped or bi-metal, fine teeth |
| Multi-tool | Small cut-outs and corrections | Carbide-tipped or bi-metal plunge-cut blade |
| Router | Finishing and profiling edges | Carbide-tipped cutter |
Cutting Trespa with a circular saw
For straight cuts, a circular saw is the most pleasant tool to use. A cordless circular saw from the Maxxpack 18V range works well on site, for example on cladding, as long as you fit a suitable carbide-tipped blade. Check the saw's specifications for the blade diameter and cutting depth.
- Choose a carbide-tipped blade with alternate top bevel or triple-chip teeth and a relatively high tooth count.
- Set the cutting depth so the blade comes out a few millimetres below the panel. Cutting too deep causes more breakout and more risk.
- On a circular saw the teeth enter the material from the underside. So place the decorative face that needs to stay the neatest facing down.
- Use a guide rail or a clamped straight edge. A rubber mat or anti-slip mat under the panel stops it shifting.
- Push steadily and evenly. Forcing the saw makes the blade hot and the edge rough.
On a table saw the blade runs from the top down. There you place the decorative face upwards.
Cutting Trespa with a jigsaw
With a jigsaw you can cut curves, rounded corners and cut-outs, for example for a pipe or an air vent.
- Use a carbide-tipped or bi-metal blade with fine teeth.
- Switch the pendulum action off or set it to the lowest setting. A high pendulum setting makes the panel crack.
- Keep the base plate flat on the panel and do not press too hard.
- Standard blades cut on the upstroke, so the top face chips most. Place the decorative face down.
For a cut-out in the middle of the panel, first drill a hole in each corner large enough for the saw blade.
How do you protect the panel while cutting?
- Leave the protective film on the panel for as long as possible, including while cutting.
- Cover the cutting line with masking tape and mark on that. That way you do not scratch the decorative layer and you get less breakout.
- Clamp the panel with bar clamps or locking pliers, with a piece of scrap wood or card between the clamp and the panel.
- Support the panel properly along its full length, so the offcut does not snap off at the end of the cut.
Drilling holes in Trespa
Drill with a sharp metal or HPL drill bit at a medium speed, without hammer action. Put a backing board under the Trespa so the bit can run out into it and the back does not break out. For cladding, fixing holes are usually drilled larger than the screw so the panel can move with changes in temperature. Follow the panel manufacturer's installation instructions for this.
Finishing Trespa edges
After cutting, the edges are sharp and sometimes a little rough. Lightly chamfer the edges with a file, a sanding block or a router with a chamfer cutter. Sand from the decorative layer towards the core, not the other way round, so you do not lift the surface layer. A routed, slightly chamfered edge looks crisp and prevents cuts.
Cutting Trespa yourself or having it cut?
For a few straight cuts and some cut-outs, you can easily do it yourself with the right blades. If you need a lot of panels or they have to fit to the millimetre, as with a complete wall of cladding, it is often easier to have them cut to size by the supplier and only make the fitting pieces yourself.
Cutting Trespa safely
HPL dust is fine and hard. Use dust extraction and wear an FFP2 dust mask, safety glasses and ear defenders. Wear gloves when handling cut panels, as the edges are sharp. Remove the battery from the saw before you change the blade, and keep your hands out of the line of the cut.
Common mistakes when cutting Trespa
- Using a wood blade without carbide teeth, which is blunt after a few metres.
- Placing the decorative face on the wrong side, so the visible face breaks out.
- Cutting with the jigsaw on a high pendulum setting.
- Not supporting the panel, so the last piece snaps off.
- Pushing too hard, so the blade burns and the edge turns dark or rough.
Frequently asked questions about cutting Trespa
Which blade should you use for Trespa?
A carbide-tipped blade with alternate top bevel or triple-chip teeth and a relatively high tooth count. An ordinary steel wood blade goes blunt quickly in HPL and leaves a rough cut.
Can you cut Trespa with a jigsaw?
Yes, for curves and cut-outs. Use a carbide-tipped or bi-metal blade with fine teeth, switch off the pendulum action and do not press too hard.
Which side do you cut Trespa from?
With a circular saw and a jigsaw, place the decorative face down, because the top face breaks out the most. On a table saw, place the decorative face up.
Do you need to treat the edges of Trespa?
After cutting, lightly chamfer the edges with a file, sanding block or router, so they are not sharp and look neat. Whether an edge needs any further treatment is set out in the panel manufacturer's instructions.
In short: cutting Trespa
Cut Trespa with a circular saw or jigsaw fitted with a fine-toothed carbide-tipped blade. With a circular saw or jigsaw, place the best face down, leave the film on and tape the cutting line. Work with extraction and a dust mask, and chamfer the edges afterwards with a file or router.
