Celotex Saw

I used an old hardpoint saw, I think any saw will do just fine although it does create a lot of dust (do it outside). Alternatively an insulation knife may work but will struggle on 100mm - gives a cleaner cut with less mess.

 

Fine point hand saw might work,but sometimes they pinch/jam in the cut, but I use a old serrated bread/carving knife.
Old electric carving knife might also work.

http://www.screwfix.com/p/bahco-prizecut-hard-point-toolbox-saw-14/44210

http://www.screwfix.com/p/irwin-jack-500-universal-saw-8tpi-20/69735

 

Just remembered I have some Bosch S1113AWP ReciprocatingSaw blades for cutting insulation, have never used them, as I lost them, then found them again when having a spring clean.

 

I think I'd struggle to cut a straight line with a jig saw, as it is I used a 2x2 batten clamped down as a guide but I guess you'd do the same if using a jig saw.

 

Well yes, it would work, but really no need for power tools. A hand saw is easy work with this stuff.

 

An old bread knife works too.

 

A deep/tall blade helps, and using a piece of 2" timber as a guide gives you a reference for a vertical cut.

 

I have a Celotex branded saw which I use. It supposedly creates less dust, but I can't say for definite it does that!

If you've got a wood saw to hand, then just use that...and wear a good dust mask

 

I don't like using a tipped saw.

A sharp bread knife or the one Dr Bodgit shows above is ideal. I have used a BoschT313AW Serrated Edge Knife Jigsaw blade in a handle -

http://www.screwfix.com/p/bosch-multi-purpose-jigsaw-blades-bayonet-t313aw-pack-of-3/33351

OR

http://www.axminster.co.uk/bosch-t313aw-serrated-edge-knife-jigsaw-blades-501700

 

Now that's a good idea Po, hadn't thought about using a handle with the Bosch-s1113AWP blades I have.


http://www.kelvinpowertools.com/bos...bre-saw-blade-for-insulation-2pk-c-243-p-8302

 

Those blades are more for fibre insulation than form type.



What I have found with Celotex and similar, is use a metal straight edge to put a 10 -15 deep cut in the board, then use that cut as the guide to go full depth and it will follow the initial cut 99/100 times.

 

I just used a standard Irwin hand saw. It is easy to cut.

 

Of

I agree Mike. **** through it with a handsaw and makes cutting a slight taper easy if required