Hello all, I'm a few weeks out from getting a steel roof on my new house. Trying to get materials together for roofers. It's going through a 10/12 cathedral 2x12 rafters, metal roof. I'm was planning to use a cathedral support kit. Supervent says JURBFK1 Rubber Boot Flashing kit is required for metal roofs. When I read the instructions for the boot kit, it gives no framing provisions when using a cathedral support kit. What am I missing? Can this be done? If not , are there alternative brands I should be looking at?