By all means insultate between the joists, it's the main source of heat loss in a house, currents, standards, although they keep moving, is to lay 100mm with the joists then crosslay 150mm across.
Whatever you do don't put ordinary loft insulation inbetween your rafters, you'll end up trapping moisture inbetween your roof felt / latts and the insulation.
Good luck
http://www.harriscarpentry.co.uk/
Apr 24, 2010
Insulation by: Anon
Yes I would absolutely recommend insulating between the joists.
The insulation will not only save heat escaping but also provide sound insulation. For a minimal cost it will save you plenty of money in the long run.
