Has anyone tried using the hemp-fibre based insulation from new Scottish outfit IndiNature?
I heard about them on the Zero Ambition podcast and they seem a very sound outfit. We've been very short of UK manufacture of natural insulation so it's good to see some happening.

I need to top up my loft and do some insulating around the eaves and some slightly-flexible woodfibre or hemp batts seems like a good material to use (move any moisture away from the joists and a bit of squishiness helps with the awkward shapes). But it does matter how easy it is to cut as I need to make diagonal 160mm cuts to make a wedge-shaped base piece.

I know sheepswool (Thermafleece) is extremely difficult to cut. Fluffy woodfibre is easy - solid woodfibre is more or less like timber. Semi-rigid rockwool batts are easy. I have no idea where hemp batts fall on this scale.
Looks like they have loft batts (IndiLoft) and flexible wall batts (IndiTherm) available now with semi-rigid boards coming any day now. The IndiTherm appears to be reasonably widely available already (e.g. from ecomerchant).

There is a youtube vid here showing cutting with a 'wavy edge' insulation saw: https://www.youtube.com/watch?v=AoiPd8VM3bQ
I'm not familiar with those. That makes it look to me like it's harder to cut than soft woodfibre but easier than thermofleece, but it's quite hard to tell.

Posted By: wookeyHas anyone tried using the hemp-fibre based insulation from new Scottish outfit IndiNature?

Not from them, but I'm currently using a near-identical product in France, where it's already much more common than in the UK. A good product with superior adsoprtion & desportion properties to most other insulants, and pleasant to work with.

Posted By: wookeyBut it does matter how easy it is to cut as I need to make diagonal 160mm cuts to make a wedge-shaped base piece.

It's doable with a wavy-edge saw for small quantities, but for large numbers of cuts it's a PITA. Hire or pick up a second hand Bosch GFZ 16-35 AC reciprocating saw with wavy-edge blades, and it becomes a pleasure.

Posted By: Peter_in_HungaryOr for the cheapskates amongst us would a Parkside reciprocating saw also work?

I generally like Parkside stuff. Do they do wavy edge blades?

Parkside reciprocating saws use generic blades not brand specific

Looks more like a normal reciprocating saw to me, just with a guard. Nothing to suggest any chains or whatever?

Yes, this is an alligator saw, it has a rigid 14" bar sticking out of the front (like the bar of a chainsaw) and the teeth slide along the bar, powered by the motor in the back of the saw. There are two sets of teeth sliding in opposite directions so it doesn't 'pull' on the material, which doesn't need to be clamped.

The Bosch one doesn't seem available in UK, but buy online from Germany for £1500. There is a DeWalt version at Screwfix for £800, without batteries. Haven't seen a parkside version yet!