"Andrew Vevers" <
http://www.environmentalconsultants.co.uk> wrote in message
news:434bc07d$0$17364$cc9e...@news.dial.pipex.com...
I would think it unlikely that a reputable loft company would hack about a
trussed rafter roof (a cowboy would, and do!). Trussed rafters, as I'm sure
you have worked out, are generally made of small section timber and rely for
their strength on load sharing between the various members. Take the
internal bracing away, they would flop about and the roof collapse. On top
of that the ceiling ties would be of indequate section to become floor
joists. If you want to do a loft conversion, then the only way would be
replace the roof either with new room-in-roof trusses or a built on site cut
rafter roof and new floor joists. If you are considering this, I would
strongly advise obtaining professional architectural and engineering advice
(not from a loft company).
Bob H