Our roof mounted retractable awnings provide additional heigth where needed.  We use a very sturdy installation method using heavy duty roof mount brackets that support board covered with aluminum, protective hood, and retractable awning.  Awning is slightly elevated above roof line, onto the brackets, to allow for  rain, snow, leaves, etc to escape into gutter, as usual, without interfering with the awning.
Retractable awning with hood, installed on gable end of home, with optional vertical drop valance with hand crank..

Copyright 2010 Sunshine Awning:  Retractable Awnings.  All Rights Reserved
Click on the pictures to left to see before and after .......

Wow - what a difference!