Roof Slope/Shape

[sjsl]

Trying to build this roof as one piece. Can make it work with two roofs but would like to do it as one.

[bclarch]

You need to offset the upper (in your plan view) roof edge from the level an amount equal to the diference in total rise between the two halves of the roof.

Lines AB and CD are the only slope defining lines.
D1 x rise = H1
D2 x rise = H2
H2 - H1 = "height offset from level" for sketch line AB