Knauf EcoRoll R-13 Foil-Faced Insulation vs Knauf Insulation R-13 EcoRoll

Both are Knauf R-13 EcoRoll rolls for 2x4 walls, so thermal performance and build quality are the same. The real split is the facing: the foil roll is a strong vapor retarder (0.05 perms) for cold climates and damp assemblies, while the kraft roll (1.0 perm or less) is a moderate retarder for mixed climates and conditioned spaces. Owners of both praise the soft, low-dust ECOSE fibers and clean cuts; pick by your vapor control needs, not by brand.

• Choose the foil-faced EcoRoll if you are insulating 2x4 exterior walls in a cold climate or a damp space and want a strong built-in vapor barrier.
• Choose the kraft-faced EcoRoll if you are in a mixed or warm climate, or insulating interior walls where a moderate vapor retarder and easy paint-ready facing suit you better.