Knauf Ecofill WX Blowing Wool is a fiberglass blowing insulation designed for weatherizing and retrofitting existing homes or new construction. With a high degree of recycled content and formaldehyde-free credentials, it’s a practical, responsible choice for energy efficiency—no fluff, just solid performance.

Key Features & Design

• Unbonded, fiberglass blowing insulation with a high degree of recycled content — insulation that works as hard as you do.
• Designed for weatherizing and retrofitting existing housing or new construction.
• Application: Open blows in attics Dense-pack sidewalls using the drill-and fill-technique.
• Indoor air quality certifications: UL Environment GREENGUARD Certified; GREENGUARD Gold Certified.
• Formaldehyde-Free: Validated to be Formaldehyde-Free.
• EUCEB Certified.

Whether you’re insulating an attic, upgrading wall assemblies, or tackling a whole-home retrofit, Ecofill WX delivers reliable thermal performance while supporting healthier indoor air quality. It’s a straightforward choice for contractors and discerning homeowners who value sustainability, certification, and real-world results.