Sub-Surface Constructions

Construction tab in model data under Construction header

 

Sub-surfaces are used to define areas of a surface having a different construction to that of the main surface construction. Typical examples include cold-bridging elements such as window lintels and opaque panels in a lightweight facade. You can define different sub-surface construction types for external walls, internal partitions and pitched roofs. This makes it easier to set up defaults at building, block or zone level.

 

Sub-surfaces are modelled in the same detail as standard surfaces including the effect of thermal mass but not including any 2-D or 3-D heat conduction effects due to the interface between the sub-surface and the background parent surface.

 

To add a sub-surface, go to the surface you wish to work on, click on the Layout tab and select the Draw sub-surface command.

 

You can also define default constructions for doors.

Walls

Any opaque sub-surfaces created in a wall will have this construction.

Internal

Any opaque sub-surfaces created in any inside surface (partitons, internal floor etc) will have this construction.

Roof

Any opaque sub-surfaces created in any pitched roof will have this construction.

External door

Defines the construction of external doors.

Internal door

Defines the construction of internal doors.