Replace Insulation In Pole Barn Roof

Pole barn insulation thickness one or two inches.

Replace insulation in pole barn roof.

R values indicate the insulative properties of the material used. Above the roof trusses this choice comes with new construction or a roof replacement. Closed cell spray foam insulation would need to be added in the area closest to eave sidewalls. Pole barn or post frame buildings are typically constructed using wood framing with steel roofing and siding.

To repair it there are two primary methods. Here the insulation is placed between the inner purlin supported by the truss and the outside metal panel. Insulating a barn roof is very similar to insulating any other kind of building. The higher the r value the higher the insulation capacity.

Depending on the type of barn your requirements may vary. If the insulation has aged like this the roof would benefit from new fasteners. However barns are colder than other buildings and may require more insulation. If it is a barn for keeping animals in insulation is much more important.

When the old panels are removed new larger fasteners are used to put it back together. This will provide a greater r value than r19 batts and provides a vapor barrier. It ranges from r 5 to an r 16 value depending on the type. The fiberglass insulation used in this method can be as high as r 13 insulation thickness on single layer systems range from r 7 to r 30.

Weighing what you have to start with my recommendation is to spray three inches of closed cell foam insulation below your roof sheathing. One or two inch insulation can be placed on the exterior of the building underneath the steel.