Question: Is there one word that includes walls, ceiling, floor - basically all the faces of a building?

For example I would like to use such a word in the following sentence: 

> 
> "All the X of this building are made of wood".
> 
> 
>

Answer: 
Well there isn't any one word that is totally right.

You could argue that *surfaces* is right,

> 
> All the **surfaces** in this building are made of wood.
> 
> 
> 

You could argue that just *walls* could means walls, ceiling and floor.

> 
> All the **walls** in this building are made of wood.
> 
> 
> 

Or maybe you could say:

> 
> All the **structure** of this building is wood.
> 
> 
> 

But really there are quite a bit of words you could use and it's kind of personal preference.
There is no English word to cover this. As has been suggested, structural surfaces is as good as anything.