Rockwool / loft insulation 29/30cm width?

[JP_]

My floor joists are 29-30cm apart, I have 9 gapes to fill between 3m joists, so need about 30m of insulation at 30cm widths.

Is there anything of this size that anybody has come across? Or am I going to need to cut it up?

 

[JP_]

just found this - http://www.insulationshop.co/50mm_thermafleece_eco_roll_370mm_wide_pack_of_3.html
would 37cm width, 5cm depth, shove OK into a 30cm gap, with plenty of height? Does this stuff squeeze up OK?

 

[John D v2.0]

doesn't squeeze up that well, tends to ruck up a bit and leave gaps on top or bottom, but all you need is either cut the whole roll with a saw, or unroll and use a long bit of wood and a craft knife to do a straight cut.