On 1 Aug 2020 at 09:19:40 BST, "Tim Lamb"
wrote:

In message , Jimk
writes
snip



Oh dear...
You mean the sheets that have been cut I to pieces to fit snugly
*between* joists?
Riiiggghhhttt...

Hand held or bench circular saw, then finish the cut with a hand saw.

Far and away the easiest I've found is an old (but still sharp) non-serrated
kitchen knife, 9" or so blade. Makes a neat job of anything up to 50mm (at
least - that's the thickest I've tried).

--
Cheers, Rob