On Wednesday, 23 October 2019 20:28:28 UTC+1, alan_m wrote:
On 23/10/2019 18:10, Dave Plowman (News) wrote:

Do remember a jigsaw cuts on the upstroke, so for best results cut from
the underside. But it's simply not the best tool for the job. A decent
circular saw will give a near perfect cut.


You can get blades that cut on the down-stroke (reversed teeth)

https://www.screwfix.com/p/bosch-t10...m-5-pack/15283

(possibly not the jigsaw blade fitting the OP requires)

It's these type of blades that will require any orbital/pendulum action
to be disabled on the saw.

However the OP may/will have the plastic coating on both top and bottom
surfaces so such a blade may produce one surface without chips and the
other with more chipping.

What may also help on the lower surface is to clamp a thin sacrificial
piece of wood to the board and to cut through both at the same time. The
sacrificial wood will support the plastic laminate and prevent chipping.

That's the gold standard. Another good plan which you can't do is to set your circular saw blade shallow. All other approaches help but not so much as clamping wood on.

Jigsaws are seldom a good tool for the job. Circulars are way more useful.


NT

I would still also use tape along the cut line.