When using unfaced insulation and when installing faced or unfaced insulation in a crawl space with a dirt floor, it is important to provide separate vapor protection to prevent the insulation ...

You can use either faced or unfaced material here. If you choose the latter, you must add a separate vapor barrier over the insulation. I`ve found polyethylene film works well here.

Batts are typically flat and come faced or unfaced. Blown-in insulation or loose-fill insulation: Blown-in insulation requires a blower along with proper safety gear like a mask, ...