In article ,
John Rumm wrote:
You could use your jigsaw if you break the end off a blade so that at
full stroke it is just long enough to reach through the floorboard. Then
you should be able to jigsaw along the centre line of the joist without
actually cutting the joist (much!).

Yup - my preferred method. And you can start the cut in the middle of the
board with no pilot hole by slowly pivoting the jigsaw from vertical to
horizontal if you have a firm grip. Then turn it round to cut to the other
end.

(your circular saw will also do the job since you can set the depth of
cut on that to the thickness of the boards)

Trouble is a circular saw will damage adjoining boards.

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Dave Plowman London SW
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