i was taught years ago the right way to use a framing square,and i am now lost.....i would like to know if there is a easy way tho could tell me how......i am in the process of tearing down my old wooden porch and can not remember how to lay out my rafters for ,i think,it is the plumb and level cuts for the rafters,also is it possible,just to tear down old walls to porch and use old or existing roof with out taking the roof completely down,........like everyone else in these economicly stressful times ,iam recently out of work,money is tight but this porch,is an absolute,dilapidated,ugly mess!!!..........thank you ......PLEASE NORM OR TOM RECUE ME(LOL)DESPERATE IN RIDLEY PARK PA..............KEVIN