I am considering putting a ceiling in my conservatory to make it more like a sun room and to improve insulation in the winter.

In theory it appears really simple. I would use 4x2 for the joists and plasterboard it, placing loads on insulation in the roof space. Also I would consider sheeting the inside of the conservatory roof incase it appeared unsightly from the outside.

Any thoughts?

i wouldn't do that until i had tried other things if i were you.

having said that, no need for 4x2 - 2x2 should do the job...just need to make sure the roof structure can cope with the additional load and how to attach to the roof plate without losing too much ceiling height. is it timber or aluminium framed?

have you tried those solar reflective films? i presume you have a glass roof rather than polycarb (if you had polycarb i expect you would have tried solar relective inserts by now)

....if you're going to put a ceiling in, you could always vault it - will give you so much more space than a flat 2400mm ceiling would

Thanks for the input.

The solar reflective film would not keep out the noise though and I am sure putting in a celing with insulation would keep it alot warmer?

What do you mean by 'vault it'

you're right; film will do nothing for the noise side of things.

vaulting follows the line of the roof. here's an example - DSCF0143.jpg - Image - Photobucket - Video and Image Hosting (http://s22.photobucket.com/albums/b307/rg194/Home/?action=view&current=DSCF0143.jpg)

btw, those blanking plates you can see in the pic are for co-ax and network cables...handy for future sound distribution or projector or whatever