No line of sight for DishNetwork, will Directv work?

We had Dish Network out 3 times to move our dish - twice I warned the technician when spring and summer get here, the dish will be blocked and twice he told me, no it's okay. Finally, got my money back from Dish and went with Direct TV - who said, let's put it on the roof and I never had another problem. I think it's worth it to have them out - both our receiver's, remotes, and dish were much better quality with Direct TV.