I want to make the move to the Dish Network from DTV. I have the HD DTV dish and want to know if the HD Dish Network dish will mount to my DTV mast? I really don't want any more holes in my new roof.
Yep, They will most likely will want to use your existing mast. They don't want to put any unnecessary holes in your roof either.
You probably have a slimline dish so the mast is a little bigger than the mast needed for the dish network dish but there are adapters they can use.
BTW: Dish networks satellites in the sky are a little further to the west from where the Directv's dish is pointing using the Western arc and a little to the east of where Direct's dish is pointing when using the eastern arc dish.