'15 Coachmen Class C Roof Construction (layer diagrams)?

contacted Coachmen 2x over the last month with no response yet

Did u email them or call ? Large companies get hundreds upon hundreds of emails on a day to day basis that they cant keep up with. Especially tech related bc it involves being passed on to another person.

Calling has better results than emailing. Ask to speak to a tech or service rep. They should at least answer the phone when people call.