When i do a skylight on a shingle roof,
My roofing butts to the side of the skylight.
When i install on a low slope roof,
My roofing material goes up the wall of the skylight.
Absolutely Not a do-it-yourself job.
I build my own curbs out of 2x6 and use "cant strip"
If you just try to "butt" method,
There is a strong chance
The material will eventually shrink, break loose and leak.