Cargo Trailer Roof Vent Question

Hey All,
I am looking at adding a roof vent for ventilation to my 6x10 Pace cargo trailer. I saw this at etrailer.com and though this would work.
http://www.etrailer.com/pc-rv~65561.htm
My question is this. The 6x10 I have has nothing on the roof but the metal roof beams and the metal skin roof. Do I need any kind of wood bracing for this? Also, I have heard of people using butyle tape to seal it up. Is this all I would need to install it? I just want to make sure before I start cutting holes in the roof.
Thanks any assistance given.
-V/R
Slade
I am looking at adding a roof vent for ventilation to my 6x10 Pace cargo trailer. I saw this at etrailer.com and though this would work.
http://www.etrailer.com/pc-rv~65561.htm
My question is this. The 6x10 I have has nothing on the roof but the metal roof beams and the metal skin roof. Do I need any kind of wood bracing for this? Also, I have heard of people using butyle tape to seal it up. Is this all I would need to install it? I just want to make sure before I start cutting holes in the roof.
Thanks any assistance given.
-V/R
Slade