This 2 leg Satellite Dish tile roof mount is fitted under the roof tile, the support bracket also mounts under the roof tiles and is adjustable to the spacing of the rafters. This unit is easy to ship as it comes as two separate pieces (both included) so it can ship flat.
To install you need to remove the bottom two tiles and the adjacent tiles to give you room to access the rafters. Before screwing the main pole into place you need to chisel a small section out of the wooden facia so when you fit the main mast the tiles sit back down flat. When fitting the support arm you will also need to repeat this process. Make sure when you fit the main mast it is important that the pole is plumb level, use a spirit level. The support arm is just for support it does not need to be levelled.