For any pole barn unfinished wall system we sell 6 thick friction fit insulation that is installed between the posts from the inside after the building is erected.
Insulate pole barn roof or not.
Closed cell spray foam insulation would need to be added in the area closest to eave sidewalls.
Make sure the attic space above the insulation is adequately vented.
Pole building ceilings the most common way to insulate the roof of a pole barn or pole building is to place the insulation blankets at the bottom of the truss.
Do not place a vapor barrier under blown in insulation.
This is typically done by placing metal banding 30 apart down the length of the pole building.
This will provide a greater r value than r19 batts and provides a vapor barrier.
Some things to consider when insulating a pole barn include.
Weighing what you have to start with my recommendation is to spray three inches of closed cell foam insulation below your roof sheathing.
Condensation issues and the specific thicknesses and types of roofing and wall insulation materials.
The best way to insulate your ceiling is to blow in cellulose or fiberglass to at least r45 if not r60.
There most common options for insulation are fiberglass blankets and spray foam.
This type of insulation should be covered since it is very flammable.
Mike the pole barn guru.
Pole barn insulation thickness one or two inches one or two inch insulation can be placed on the exterior of the building underneath the steel.