The flat roof – thermal bridges.

A separate partition, which should be analyzed is the flat roof.
Just like against the wall, the first thing to know is U0.
As before, we calculate U0 numerically or "manually".

U0= 15,5484 / 40 = 0,389 W / m2K

Another considered thermal bridge is the connection of the external wall and the flat roof.

Ul = 26,3979/40 – 0,5*0,5208 – 0,5* 0,3889 = 0,205 W / mK
attention. It is recommended to separate the internal environment into those adjacent to the wall and adjacent to the flat roof, for appropriate separation of the Ul values.