On 11/04/2010 22:22, Roger Munford wrote:
> Will have to learn from scratch but I hope to be able to quickly produce
> a simple 2D plan of my roof showing position of rafters,  rooflights etc.
I've used Inkscape for basic room planning.
It's a bit fiddly though and primarily designed as a vector drawing app 
rather than a CAD app.
-- 
Dee Earley (dee@???)
irc:    irc://irc.blitzed.org/
web:    http://www.earlsoft.co.uk
phone:  +44 (0)780 8369596