One of the first things that happens in a post like this (as it should) is an admonishment to consult an engineer. I have already and more to come on that. The next might be let a professional do the work and I agree totally. I have no aspirations to raze my roof.

Exposed ceiling trusses adds a stylish visual aesthetic to any living space in your home, making it feel warm and cozy—and very in trend.

IsoBoard is a thermal insulation board that can be used in exposed applications. It provides superior thermal insulation AND a beautiful backdrop to exposed trusses. Available in a tongue and groove (IsoPine) and beveled edge finish. #isoboard #thermalinsulation #insulationboard #roofing #roofdesign #roofideas #ceiling #exposedceiling #ceilingdesign #ceilingideas #highceilings #homedesign #homeideas #architecture #interiors

IsoBoard is a superior thermal insulation board that can be used in exposed applications. To achieve this look, you can install the board over truss, under roof sheet OR retrofit the board between truss members. #roofing #ceiling #thermalinsulation #interiors #architecture #homeimprovement #renovationprojects

Google Image (no ceiling)

This stone-and-stucco home overlooking the Blue Ridge Mountains in South Carolina was built with two things in mind: mountain air and golfing. —Stefanos Chen

King post trusses inside log home.