They can also be put lower on the rows of screws that hold the metal sheeting to the roof batons.
Installing antenna on metal roof.
In order to take advantage of a metal roof as a ground plane you cannot elevate a quarter wave vertical high above a metal roof.
You can also buy non penetrating mounts that use weights rather than screws to hold them in place.
In order to mount an antenna on your roof without damaging it you should attach the antenna to the gable the fascia or the chimney.
I always recommend mounting tv antennas as high as possible.
A metal roof discourages the transfer of signal by reflecting it away from you.
Thus buildings with a metal roof or many metal components will face difficulty watching tv.
Whatever you do do not put holes in your roof to attach your antenna.
Tin roof mount where to place the mount.
But what if you have a metal roof.
Be sure that the antenna can see over the roof.