Brief definition
In an attic with sloping ceilings, only parts of rooms count as living or usable area where specific height and geometry conditions are met. The slope itself must be distinguished precisely from the usable area below.
Practical relevance
Incorrect manual take-off in attics is common. Clean geometric determination from drawings reduces disputes in living-area certificates and early design.
AIGO relevance
From 2D sections and floor plans, AIGO extracts room geometry deterministically. Professional application of WoFlV allowance and deduction rules remains the planner’s responsibility — AIGO supplies the verifiable geometric basis.