Conservatory floor construction?

[baldersj]

Hi,
It's been ages since I've been on here, nice to see it's still lively!
We are in the planning stages of a conservatory, and have been given differing opinions of which type of floor to go for.
The Double Glazing co. suggested a 'floating' floor construction using joists and insulation blocks and then boards on top (I guess because it's quicker for them...?), one builder suggested the full concrete screed method.
I am a complete novice when it comes to this, any suggestions/advice?
I can see advantages to both, the first seems more energy efficient as we are considering underfloor heating, and it seems to me a lot of heat would be lost into a concrete base.
On the flipside, concrete seems like the more solid option, but I just don't know!
FYI, the floor would need to be built up approximately 14-16" to bring it up to the level of the house, and we are on relatively flat ground.
Any experience/advice greatly appreciated!!

 

[^woody^]

If you are having under floor heating, then you should go for an insulated concrete slab. This will not lose heat but retain it better than timber.
Plus timber floors can become creaky with regular on/off heating cycles

Apart from that the only real advantage for timber floors is for the builder in terms of ease and speed of construction. In contrast there are several disadvantages for the householder

 

[baldersj]

Cheers Woody,
Any idea roughly how long it would take for the base to go off before building could start?

 

[^woody^]

One day

 

[baldersj]

Ta