Hi there,

first of all, I'd suggest that you download and install the free patch for your program
http://patches.punchsoftware.com/
Stopping the topo --> the walls must be fused -->verify if the exterior walls are 100% linked in order to become an enclosed perimeter When you draw 2 or more walls and you join them using the mouse, you will notice that they will "fuse", and instead of two or three different walls you will have a set of walls, with the same properties (thickness, pitch and shape included)
However, if you join them using the arrows (keyboard) the walls will be together, but they will not fuse so you will be able to set different properties and the topo will be inside your house

Patricia
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