I am in the process of replacing asbestos cement corrugated sheeting with Colorline bitumised corrugated sheeting. I have had to replace all the trusses in the garage. I have now come to the end wall which is sloping from the back wall to the front. The walls are just a single brick thickness and I am needing some advise on how to attach a rafter to the wall. Neither the back or front walls have anywhere to fit a cross beam to. I had thought of having the rafter on top of the sloping wall, but I don't know how to secure it in place. Please advise :?: