Door sill height

[Katalyst777]

Double-click a room with the Select Objects tool or select a room and click the Open Object edit button to open the Room Specification dialog.

On the General tab of the Room Specification dialog box you will see Floor Height.

Sounds like yours will need go to negative eight inches (if your original assessment that the door was eight inches too high was correct).

Make sure to get rid of the "(D)" otherwise the sneaky program will reset to the default value for floor height!