New roof system will need to be able to accommodate weight of snow drifting against existing wall or sliding off from roof depending upon whether reverse gable will be added to endwall or sidewall.
Frame gable roof soffit.
The cleanest look for a gable end with a closed eave is to angle the soffit therefore eliminating the need to resolve the eave at the gable end.
This is how i did my pole barn workshop and at the end of the video i also show.
Before you nail it slide it a tiny bit out from the back of the f channel approximately 1 16 inch.
This is a very small amount but it will keep your soffit from bending later.
The other end will be closest to you.
Here s how to frame a boxed soffit on the eave and gable end of a building.
Ridge work out how wide you want the barge soffit boards.
How to frame a reverse gable over a door on an existing pole barn.
With enclosed overhangs soffit will attach to this solid blocking.
This configuration gives the look of an open eave but it has the same benefits ease of maintenance and energy performance as a closed eave.