1. Get lined up facing the edge of the chimney, not right on it, but a little in (so when you jump you catch as high up on the edge as you can)
2. press space then tap forwards (dont hold, and dont run and then jump)
3. Repeat step 2
4. Now heres the hard part, you have to run and then jump quickly (hold W and press space), and sometiems it wont work (like 6/10 times for me, i dont know exactly what situation makes it work), so keep at it, eventually you will get sorta "stuck" in a third higher position on the chimney, and from there you can get onto the roof (sometimes you will fall).
all in all this takes me no more then about 2 min max
Sorry if its a repost, i searched the forums and checked the thing in the create a topic area.
Search Topics:
Arathi
Arathi Basin
Arathi Basin Farm
and found nothing, so i assumed it was either super old or not posted yet.
very great defensive position, not so great with my character (shaman), but very nice with a hunter, or an aoe class, you can sit there and plug the alliance/horde all day, and if they shoot you, you can go to one part of the roof taht they dont have LOS to
one other thing about the roof, those little fences on the top are able to be passed through one way, but not the other. the other they act like a solid object, and you have to jump over them. just a small side note.
-Phate