Cellulose Insulation Quality
3.8 R per Inch
R-Value is only one factor to consider when choosing insulation. The performance of an insulation material is also dependent upon reducing heat loss through air infiltration, convection and radiation. Cellulose insulation reduces air infiltration and convection better than other insulation products with the same R-Value, giving cellulose insulation superior overall performance.
Yes!  The performance of Nu-Wool Premium Cellulose Insulation, Nu-Seal Spray Foam and ECOCELL products are backed by an industry-leading 10-year Energy Guarantee on heating and cooling bills. Nu-Wool Co., Inc. is the only manufacturer to offer this type of guarantee!
All loose-fill insulation products can settle over time. By federal law and industry standards compensation for settlement is built into cellulose insulation coverage charts. When installed properly in accordance with the coverage chart, loose-fill cellulose insulation will not settle below the intended R-Value. When Nu-Wool Premium Cellulose Insulation is properly installed in wall cavities to a density of 3.0 to 3.5 pounds per cubic foot using the Nu-Wool WALLSEAL System, it adheres to the studs, plates and sheathing, and will not settle.
Cellulose insulation has a Class A Fire rating. It is treated with fire retardants to meet all federal, state, and local fire safety requirements. Nu-Wool Premium Cellulose Insulation contains 100% borate-based fire retardants, and has been successfully tested in over 50 UL approved 1, 2 and 3- hour firewall designs.
Cellulose Insulation Installation Process
Under most conditions gypsum board can be installed 24 hours after a 2×4 wall cavity has been filled and 48 hours after filling a 2×6 wall.
Yes. Nu-Wool trains installers how to properly dense pack a cathedral ceiling .
Read more on the Cathedral Ceiling page.
Meeting Test Requirements & Building Codes
- ASTM E-84
- Consumer Protection Safety Commission 16 CFR parts 1209 and 1404
- Additionally all thermal insulation must follow the Federal Trade Commission rule 16 CRF part 460
ASTM is responsible for writing the test standards. ASTM C-739 provides most of the test procedures while ASTM E-84 and E-970 provide the standard to determine flame spread and smoke developed as well as critical radiant flux, respectively.
Yes, in fact there are over 50 fire wall assemblies using Nu-Wool Premium Cellulose Insulation listed on the UL website.
The 2012 International Residential Code defines 3 classes of vapor retarders:
- Class I0.1 perm or less (i.e. sheet polyethelen, unperforated aluminum foil)
- Class II1.0 perm or less and greater than 0.1 perm (i.e. kraft-faced fiberglass batts)
- Class III10 perm or less and greater than 1.0 perm (i.e. latex or enamel paint)
Buildings in zones 1-3 do not require any class of vapor retarder on the interior surface of insulated assemblies. Zones 4-8 require nothing more than a Class III vapor retarder on the interior surface of many types of insulated assemblies, dependent upon the specific zone and wall construction components (ordinary latex paint qualifies as a class lll vapor retarder).  Consult the building codes that affect your area.
No. Building codes, as well as most flue and chimney manufactures, require a minimum air space between flues and any combustible material.
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