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Product Information Cellulos vs Fiberglass

How is Nu-Wool WALLSEAL® different from other insulation materials?

Nu-Wool WALLSEAL is sprayed in place, eliminating the voids and air pockets common with other insulation materials. Density, or weight per cubic foot, which is important in reducing air infiltration and increasing "Effective R-value", is more consistent with the Nu-Wool WALLSEAL system. The contractor and the customer can actually see the insulation in place and know that all of the areas in a wall are insulated.


6-8 times denser than fiberglass because on a 2x4 wall cavity a 12" by 12" square spray on cellulose weighs 3-4 pounds versus an R-13 fiberglass batt weighing 1/2 of a pound


Because of the greater density that spray on cellulose has it has no air movement and requires no vapor barrier


When a blower door test is done.  A cellulose insulated house ranges from .3 - .4 air changes per hour


Cellulose has a better fire rating than fiberglass.  Firemen prefer cellulose over fiberglass


Nu-Wool engineered cellulose insulation contains an E.P.A registered fungicide, making the insulation resistant to the growth of mold even when exposed to conditions favorable to fungal growth



Because of the lack of density fiberglass has, it must have a vapor barrier or the moisture in the house will end up in the insulation.


If the insulation obtains a 2% moisture content it will loose 50% of the R-value

When a blower door test is done.  A fiberglass insulated house has

.7 - .8 air changes per hour




How does Nu-Wool WALLSEAL compare in performance to other insulation products?

Using Nu-Wool Engineered Cellulose Insulation is more than a smart choice for it’s comfort benefits, Nu-Wool is environmentally friendly even in the manufacturing process. Fiberglass insulation is made by melting sand and recovered glass in gas-fired furnaces. It takes at least 8,500 BTU’s of energy to produce a pound of fiberglass insulation. Cellulose insulation is produced by processing post-consumer recovered paper through electrically driven mills. Estimates for the embodied energy of a pound of cellulose vary from 150 to 750 BTU’s. Converting this to BTU’s-per-R, it takes at least 40 times more energy to make fiberglass insulation than to produce cellulose insulation.

Nu-Wool WALLSEAL is a premium insulation system. Homeowners, builders, and architects choosing this system are concerned about energy costs, sound control, and overall comfort. The installers of the WALLSEAL system are factory trained and certified professionals, and are equipped with specialized machines designed for this application. The increased efficiency of the Nu-Wool WALLSEAL system, along with Nu-Wool Insulation in the attic, saves homeowners as much as 40% on heating and cooling costs.

Nu-Wool Engineered Cellulose Insulation is Best for Your Home

Independent studies by universities and research labs have shown that on the basis of installed thermal protection performance, a cellulose insulated building will obtain better performance under real-world conditions than a conventionally insulated building of otherwise similar construction. Savings are on the order of as much as 40% according to field studies.

Since less energy is used to manufacture cellulose insulation, and the resulting buildings perform closer to calculated expectations (meeting or exceeding predicted values), their fuel savings translate into lower atmospheric emissions such as CO2 implicated in global warming, and other air-pollutants from electrical power and on-site combustion sources known to produce acid-rain and smog.