Two Tower roof

How do i get to the two towers roof thing. You know the one where once you at the roof you run and jump on top of a window and you keep jumping and stuff and you get on to a big roof which zombies cant get you. A lot of people try this on quarintine help?

Okay, I'll try to explain this as good as I can without screenshots. Follow the stairs up to the roof as normal, come out of the window and go between the two raised section you're trying to get onto. Stand on the slanted section between them on either side of the hole and sprint jump from there to the top edge of the windows you come out of to get on the roof. From there slowly move forward until the wall starts to push you away from the building. Then sprint jump and rapidly move the mouse in the direction of the top of the roof. It takes a little practice, good luck.

Here's some screenies