2026-01-26 03:09 PM
I have an automatically generated Zone (used Inner Edge) surrounded by simple walls. Floor to floor height is 4m. No doors on any wall.
Why is it calculating the correct zone area, correct wall perimeter, but incorrect wall surface?
I have confirmed that all four walls are part of the zone - look at wall parts in the right-most column.
As per the dimensions in plan view, area is correct at 34.49², also confirmed by the fill at right.
Perimeter P is also correct, 24.9228m
Ceiling Height CH is correct, 4m
Zone Volume ZV is correct, 34.49 x 4.00 = 137.97m³
Why is Walls Surface Area in column 4 wrong? It shows 95.29, it should be 99.6912, i.e. 4.40m² more than showing. It's like it's ignoring 1.10m of wall length.
The zone heights are correct, both floor and ceiling linked to the stories elevations.
This is happening with a few although not all of my project's zones. What am I missing, guys?
2026-01-27 11:47 AM
@Gabor Szelei Thanks - no slabs or anything other than zones and walls in this project.
@Mathias Jonathan Thanks again, I will try with surface schedules.
2026-01-27 11:52 AM
I thought of this:
bottom right corner
It gives me good value with these settings.
It took me a long time to solve this problem too.
Gábor
2026-01-27 11:55 AM - edited 2026-01-27 11:56 AM
All my zones are set with the 'Subfloor Thickness' set to zero, as well. This is not it, Gábor : (
But, you say you solved it.
So, is it now returning the correct Walls Surface Areas in the schedule for you?
2026-01-27 12:03 PM
this is very strange!
gives me a good number for the area of the walls
((5+4)x2)x3=54
2026-01-27 12:27 PM
I also get *some* zones showing correct data. But most do not. In the screenshot here, only one of the four (WETROOM 03) generates correct data for the Walls Surfaces Area column - the other three show a smaller number than what it is.