<r>Thank you both,<br/>
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<I><s>[i]</s>hansmex,<e>[/i]</e></I> ok, I'm sorry, I don't post translation (I did not know)<br/>
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<I><s>[i]</s>puybaret,<e>[/i]</e></I> I knew this solution for a second plant (so I do now), but thanks.<br/>
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<I><s>[i]</s>Both,<e>[/i]</e></I><br/>
Anyway, it ...

I hope you understand what I mean.

I mean, no need to create a structure called "floor". Simply change this parameter to a wall made of floor.

<r>My English is not very good, but I hope you understand me.<br/>
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I want to propose interesting something from the standpoint of development.<br/>
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I love Sweet Home 3D but it has an inconvenience: make the second floor, but I think that it is very easy to change this.<br/>
<br ...