Paul, It depends on how you define your window. If you define it as an "additional window" then you have to manually remove the window area from the wall because there is no association between the two. If you define the window while you have a wall selected in TRNBuild, then the wall area should be the gross wall area (it says "incl. windows" next to the area field) and the window area will be removed internally and automatically by TRNBuild. Best, David PAUL COALES wrote:
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