Stupid question..but better to be safe than sorry...

"I am planning to put up a Antenna Warehouse Scantenna in my attic, do
I need to ground it?"

It's not a stupid question, and this should answer it:
http://www.google.com/search?as_q=an...hl=en&ie=ISO-8
859-1&btnG=Google+Search&as_epq=&as_oq=&as_eq=&lr=&as_ ft=i&as_filetype=&as
_qdr=all&as_nlo=&as_nhi=&as_occt=any&as_dt=i&as_si tesearch=&safe=images