Plasticville construction help

[Broonkah]

I recently acquired several plasticville buildings and was looking for guidance with the construction.  I want to add some type of flooring to add stability to the building, as I want to keep the roofs detached.   I am leaning toward using styrene sheeting,  but am not sure how thick it needs to be.
Also, what would be the best type of adhesive to use with Plasticville buildings?
I have looked at the Zombietown and Combat Zone sites, which were great, but still thought it best to ask here for more suggestions.

Any suggestions/tips would be appreciated.

thanks
Broonkah

[matakishi]

Plastic weld will glue them fine, or superglue if you want more chance of something going wrong.
For interior floors or bracing 60thou plasticard will be strong enough and still easy to work with.

[anevilgiraffe]

I dry fit and then superglue... but then I also do interior walls cause I'm really anal like that and can't stand to see the mold bits and reg marks on the inside.... 

god I really need to paint them... haven't decided on basing yet though... pavement or not? probably never will decide...