You will need a peak in your attic that is tall enough for the antenna to fit.
2m antenna in attic.
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The only concern with attic mounted antennas is the space available to you for mounting.
The kb9vbr 2 meter j pole antenna is 69 inches tall overall.
The attic option imposed a height restriction on the antenna of 66 inches maximum and if the rooftop exterior option was necessary randy wanted a low profile antenna.
The ge 33692 attic mount hd antenna is a notable example of an antenna specially designed for placement in the attic.
If the top of the antenna touches the walls or roof the performance may be affected slightly.
I had several rg 58 213 and lmr 240 400 coax cables in place between the shack and attic space but instead of running more coax i decided to use a remote antenna switch in the attic to feed the 2m through 70cm beams and one discone antenna.
An attic antenna is any tv antenna that you can install in your attic.