Which j-box type for Z-Wave?

[Deane Johnson]

I want to install some Cooper Aspire Z-Wave duplex recepticles in some j type boxes that will be surface mounted on a board.
 
Do I need to stick with fiberglas type boxes?  I assume metal is going to have a negative effect on the Z-Wave RF signal is it not?
 
Thanks for your thoughts.
 
Deane

 

[Big517]

I have all fiberglass and plastic New work boxes and have no problems (100+ devices). I think i saw something on the micasaverde forums about negative feedback on the metal boxes. What are the benefits of metal boxes in wall? The cons are potential network signal reduction.