Ufh or rads upstairs?

[surfcob]

Hi there, ufh is being installed on the ground floor of a new build highly insulated dormer house, 120m2 on ground floor plus 90m2 on first floor.
The design flow temp will be 40 deg C and I'm thinking of using radiators sized for 40C on the first floor,

Should I consider underfloor heating upstairs?
If so, how much insulation is needed underneath the uf heating pipes upstairs?
Thank you and regards,

 

[oz-plumber]

Will you have enough wall space for rads sized for 40C?
They will be huge..

How do you intend to install the ufh upstairs - deflection plates or similar?

It may be easier to install rads at a flow temp of 70C- 75C for ease of installation.

 

[Gasmk1]

Also consider that ugh upstairs you will not have much floor space in bedrooms because of furniture,