9 Best Of How To Insulate Gambrel Barn Roof Best Wallpaper JPG. Do not place a vapor barrier under blown in insulation. If it is a barn for keeping animals in insulation is much more important.
Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. Otherwise I would build up the outside with 2x8s and insulate accordingly. Install closed-cell spray foam against the underside of the steel roofing or roof sheathing and no other type of insulation.
Besides its unique appearance a gambrel roof also serves to maximize the usable floor space in the attic area.
Solution b requires a second layer of roof sheathing on the exterior side of the rigid foam as well as new roofing. Airspace above your insulation for proper airflow. Jul 09 2009 Then I would insulate the kneewall up to the gambrel roof. Perhaps 1 piece rigid insulation between the rafters foamed in place with additional insulation below the rafters.