Conservatory with insulated roof options?

[cascas]

I am looking to put a small 3x3 conservatory/sunroom onto the back of a single storey garage. I would prefer an insulated solid roof, as this will make the space more usable throughout the year.

If a standard polycarb roof is fitted, what is the best way to insulate? Some companys offer this as a afterthought (i.e http://www.roof-revive.co.uk/downloads/TechnicalSpecification.pdf), but can it be built from the start?

 

[^woody^]

There really is no option - you either have a plastic roof or you build a proper one

 

[cascas]

I could extended the existing garage roof (flat felt), over the new conservatory, but I cannot get my head around how the roof would be supported, as upvc is not load bearing. Does a timber frame need to be constructed to support the roof, with upvc as infill. A standard "plastic" roof is self supporting.

 

[catlad]

Build your sun room with roof then fill the openings with made to measure upvc frames, not frames first then think about roof.

 

[^woody^]

If you can't cantilever the roof, then you would typically install a support post within the frames, and then this will be hidden by over cladding