How to Cut a Laminate Worktop Without Chipping (Step by Step)

What you need before you cut

A clean cut takes four tools and ten minutes of preparation. Lay the worktop on two trestles or a pair of spare base units so the offcut is supported right to the end.

B&Q’s fitting guide recommends a circular saw with a fine-tooth, thin blade and a clamped straight edge for cutting worktops to length. That matches what fitters use on site.

J“Every bad cut I’ve been called back to fix had one thing in common: the saw wasn’t on a rail. Clamp something straight, even a spare length of worktop, and the cut takes care of itself.”James, founder, Laminate Worktops

Which way up to cut a laminate worktop

Cut so the saw teeth enter through the decor face and exit through the underside. Any chipping then lands on the side nobody sees.

• Circular saw: the blade spins up through the board, so cut with the decor face down.
• Jigsaw: standard blades cut on the upstroke, so cut face down, or use a down-cut laminate blade with the face up.
• Plunge saw on a rail: a scoring pass of 2 to 3mm first, then the full depth, gives the cleanest edge.
• Hand saw: only for the odd trim. Cut on the push stroke with the face up and expect to file the edge.

Turning the worktop over means measuring and marking from the other side. Mark which end is which on the underside before you flip it, so the cut does not end up on the wrong end.

How to measure and mark the cut

Measure the run at the back and the front, because walls are rarely square. Use the longer figure for a straight run and scribe to the wall later if the gap is more than a few millimetres.

1. Measure the wall-to-wall or wall-to-end length at the back and front of the units.
2. Add the overhang you want on any open end. 10 to 20mm is typical with an end cap.
3. Mark the length on masking tape along the cut line, on the face the saw will enter.
4. Check the factory edge will sit where the joint or end shows.
5. Measure again before you cut. A worktop can only be cut shorter.

B&Q also advises putting factory-cut edges where the edge will show, since they are more accurate than a site cut. Our 3m and 4.1m lengths come with clean factory ends, so plan the cut for the end that sits against a wall or appliance.

Step by step: a straight cut to length

1. Support the worktop on both sides of the line so the offcut cannot drop and snap the laminate.
2. Clamp the guide rail so the blade lines up with your mark, on the waste side of the line.
3. Set the blade depth about 5mm deeper than the worktop: 43mm for a 38mm top, 27mm for 22mm.
4. Start the saw before it touches the edge, then cut at a steady pace without stopping.
5. Slow down for the last 100mm where the postformed front edge is thickest.
6. Sand the cut lightly with 180-grit paper on a block, keeping it square.

How to cut out for a sink or hob

Cut-outs need more care than straight cuts because the edges sit near water and heat. Keep them clear of joints and the front edge.

1. Use the template supplied with the sink or hob, taped down face up.
2. Drill a 10mm hole inside each corner of the marked line.
3. Run the jigsaw from hole to hole, keeping the shoe flat.
4. Support the offcut from below as you finish so it does not break away.
5. Sand the raw edges and seal them before you fit the sink.

Howdens’ fitting instructions say to sand raw cut-out edges and seal them with waterproof varnish or PVA, and to fit the sink in the worktop before the worktop is fixed down. Add heat-reflective tape around a hob cut-out too.

How to seal cut edges

Every cut exposes the chipboard core, and water in the core makes it swell. Seal it the same day you cut.

Worktop Express says all cut edges must be sealed with a water-resistant material such as silicone. On a visible end, fit an edging strip in the same decor instead.

For Duropal tops, cutting to length means ordering matching edging strip to cover the exposed core. Our product pages list the right edging for each thickness, so add it when you order the worktop.

J“I’d rather a customer spent £6 on an edging strip than £200 on a new worktop. Seal the cut, even the ones under the sink where nobody looks.”James, founder, Laminate Worktops

Mistakes that ruin a laminate worktop

• Cutting face up with a circular saw, so the top edge chips.
• Letting the offcut drop at the end of the cut, which snaps off a sliver of laminate.
• Putting a joint within 100mm of a sink, where it will see the most water.
• Leaving cut edges unsealed until after the sink is plumbed in.
• Cutting a mason’s mitre freehand. That joint needs a jig and a router.

Final thoughts

Cut slowly, cut face down, and seal everything the same day. That covers nine out of ten problems we see. If you’d rather not cut a mason’s mitre, our aluminium joining strips and end caps give a neat finish with a straight cut only.