Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
Leaving aside the impact of coincident surfaces which has already been answered, are you sure these surfaces were actually coincident?
In the VE there are two types of model – “single line” and “double line”. In a “single line” model surfaces are exported to Radiance as an inner and outer surface which are separated by a tiny offset – this allows different materials to be assigned to the inside and outside. In a “double line” (or Inner Volume”) model we have moved the inner surface by the wall thickness and created surfaces to connect the two – all three of these can have different material properties.
