Look no further than the Sobetter Universal TV Antenna Mast with J-Mount Bracket.
This is everything that you will need to mount your television antenna / satellite dish to your roof. You can also use this to mount an antenna in your attic without issue.

Specifications:
Made of weather resistant iron
18.5″ in length from bottom to top
1″ Diameter
Installation:
1. Select a desired mounting location.
2. Place the mast through the mounting base of the J-pole.
3. Level up the mounting base and then mark the pilot holes to be drilled with a marking pen.
4. Drill the pilot holes (with a drill bit about half the diameter of the bolt) into the marked areas.
5. Line up the holes of the mounting base of the J-pole with the drilled holes.
6. Drill and then secure the lag bolts into the pilot holes.
7. If necessary, you may adjust the direction of the mast by loosening the two lateral nuts on the mounting base of the J-pole.

Product Features

• Made iron with a weather resistant seal
• 1″ diameter will fit most TV antennas and satellite dishes
• Pole is 18.5″ in length
• Screws and nuts are included
• 90 day warranty on parts