each bag of ecobatt r-15 insulation contains. 8 batts 93 inches long. total sq coverage per bag is 77.5. so you will need 15 bags.
No, it's 8 batts 93" long.
This material may be used in the attic. The kraft paper should be installed facing down towards the drywall. If you already have insulation in the attic and it has a vapor retarder we recommend an unfaced material running perpendicular from existing insulation.
Yes this material may be installed in a garage with 2X4 studs. Please do not leave the kraft paper exposed, apply wallboard once installed.
Yes, there is a stapling flange on the R15K15X93.
Ensure that the concrete has been properly water proofed to avoid any mold issues. Fiberglass does not promote mold. Please consult your consult your local building codes as most often a vapor retarder cannot be used on exterior walls that are below grade.
Kraft paper should face the warm side, typically that is the interior.