DirectTV used a contractor who told me my rail would not hold the 36 inch dish, so I asked for a smaller dish, 18 inch I did not need high def. He said the rail would not hold the dish and I took him out side and showed him another resident with a dish on the same type of rail.
Called DirectTV and they sent a supv from the same company who now said it was not in line of sight. The supv never called me back and DirectTV wanted to send a supv from the same co. again.
I contacted DISH no problem. I would not advise you use DirectTV if you want to be valued as a customer.