EcoFill® Wx Blowing Wool

Designed for weatherizing and retrofitting existing buildings or new construction.  This insulation provides consistent thermal performance against outdoor temperatures and helps maintain indoor temperatures.  Greater thermal resistance means better temperature control.  Made with recycled glass, it’s the smarter way to stand up to the cold.


Product Features
Quality Design
Engineered with a class A fire rating, this insulation is noncombustible. It provides good air flow resistance and improved sound control versus uninsulated areas.
Thermal Performance
Excellent thermal properties help reduce the operating costs of heating and air conditioning. Fills all gaps and voids in wall cavities, helping to meet required building codes.
Learn more
Easy Install & Handling
Installs clean and easy. Installers can spend less time installing as it requires fewer bags, compared to cellulose material — which can make the job more efficient.
Product Details
Technical Data
Technical Data
Property (Unit) Test Performance
Corrosion ASTM C764 Pass
Critical Radiant Flux ASTM E970 Greater than 0.12 W/cm²
Combustibility ASTM E136 Non-combustible
Water Vapor Sorption (by weight) ASTM C1104 5% maximum
Mold Growth ASTM C1338 Pass
Surface Burning Characteristics (flame spread/smoke developed) ASTM E84, CAN/ULC S102 25/50
Air Flow Resistance vs. Density
Open Attic Application
Open Attic Application
R-Value * Min. Bags/ 1,000 Sq. Ft. Max. Coverage/Bag Net Min. Weight/ Sq. Ft. Initial Installed Thickness Min. Settled Thickness
To obtain an insulation 
 resistance of:
Number of bags per 1,000 square feet of net area should not be less than: Contents of this bag should not cover more than: Weight per square foot of installed insulation  should not be less than: Installed insulation should not be less than: Installed insulation should not be less than:
R-11 5.3 188.4 sq. ft. 0.152 lbs. 4" 4"
R-13 6.4 156.6 sq. ft. 0.183 lbs. 4¾" 4¾"
R-19 9.4 106.6 sq. ft. 0.268 lbs. 6¾" 6¾"
R-22 10.9 91.4 sq. ft.  0.313 lbs. 7¾" 7¾"
R-26 13.2 75.9 sq. ft. 0.377 lbs. 9⅛" 9⅛"
R-30 15.3 65.5 sq. ft. 0.437 lbs. 10⅜" 10⅜"
R-38 19.9 50.2 sq. ft. 0.569 lbs. 13"  13"
R-44 23.4 42.7 sq. ft. 0.670 lbs. 14⅞" 14⅞"
R-49 26.3 38.0 sq. ft. 0.753 lbs. 16⅜" 16⅜"
R-60 33.3 30.1 sq. ft. 0.952 lbs. 19¾" 19¾"

Bag Net Weight - Nominal 28.6 lbs., Minimum 31 lbs.
Coverage and installation data were determined using a Volu-Matic® III blowing machine in third gear with 13" gate opening, 2.5–3.0 PSI air pressure, 150' of 3" diameter internally-corrugated hose. Volu-Matic III is a registered trademark of CertainTeed Corporation. *“R” means resistance to heat flow. The higher the R-value, the greater the insulating power. To get the marked R-value, it is essential that this insulation be installed properly. If you do it yourself, get instructions and follow them carefully. Instructions do not come with this package. **Based on Third Party 10-year settling study, the predicted settlement over a 20-year period would be 1 percent or less. This amount of settling is thermally insignificant. Therefore, the installed and settled thicknesses are effectively the same.
Cavity Wall Application
Cavity Wall Application - Dense Pack
Framing Cavity Depth R-Value* Density   Bags/
1,000 Sq. Ft.
Max. Coverage/Bag Net Min.
Weight/Sq. Ft.
To obtain a thermal resistance of: Number of bags per  1,000 square feet of net area should not be less than: Contents of this bag should not cover more than: Weight per square foot of installed insulation  should not be less than:
2" x 4" 3.50" R-15 2.2 PCF 22.4 44.6 sq. ft. 0.624 lbs.
2" x 6" 5.50" R-23 2.2 PCF 35.3 28.4 sq. ft. 1.008 lbs.
2" x 8" 7.25" R-31 2.2 PCF 46.5 21.5 sq. ft. 1.329 lbs.
2" x 10" 9.25" R-39 2.2 PCF 59.3 16.9 sq. ft. 1.696 lbs.
Customer Reviews
Need More Product Support?
Reach out to our technical support team for product specs, installation guidance and more.
Contact Tech Support
Related Products
Jet Stream® Ultra Blowing Wool
Our flagship product providing excellent thermal performance for new construction and existing buildings.
Bag Net Weight
32 lbs
EcoRoll® Insulation
Quality thermal and acoustical insulation with ECOSE® Technology for attics, floors, walls, ceilings and more.
3.5" - 10"
R-11 - R-30
15" and 23"
EcoBatt® Insulation
Quality engineered thermal and acoustical fiberglass batt insulation with innovative ECOSE® technology is ideal for floors, walls, ceilings and attics.
2.5" - 13.75"
R-8 - R-49
11" - 24"
Here To Help
Always working to meet your needs. With answers to your product questions and more, we’ve got you covered.
Contact Us