In message ,
newshound writes
On 10/10/2017 15:19, ss wrote:
Twinwall:
What best to use, if possible I dont want to buy as it is a one off
job.
from a 2 metre sheet I want to cut 3 x2x2 foot squares.
Tools at hand:
Blunt tenon saw, angle grinder, normal saws, circular saw 48 tooth,
Multi tool, stanley knife,jig saw with various blades.

Power hacksaw blade, with a temporary handle made from duct tape.

http://www.ebay.co.uk/itm/like/37145...m=1&adgroupid=
42200108823&rlsatarget=pla-327277252998&abcId=1128946&adtype=pla&merchan
tid=7259694&poi=&googleloc=9045579&device=c&campa ignid=856856138&crdt=0

Stiffer and stronger than a normal hacksaw blade. Fine tooth panel saw
will work, the problem with a tenon saw is that you will have to
maintain a shallow angle to clear the spine.

I have occasionally used a circular saw. Nasty dust so best done
outdoors. I have also used a jigsaw with a fine tooth blade for cutting
PIR foam backed plasterboard.

If you do use a handsaw on thick foam it is worth finding an offcut with
a known 90 deg. corner to use as a saw gauge.

--
Tim Lamb