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“R- Value” is an expression of heat transfer resistance, and this is the standard for measuring insulation performance. At 3.6 to 3.8 per inch cellulose insulation is considerably better than most mineral fiber blowing wools, but R-value is only one factor in the energy efficiency of a home.
Studies of actual buildings regularly show that cellulose-insulated buildings may use 20% to 30% less energy than buildings with fiberglass, even if the R-value of the insulation in the walls and ceilings are identical. One reason for this is the capacity of cellulose to stop air infiltration.
Stops Air Drafts
The fibers of cellulose insulation are finer and more flexible than mineral fiber blowing wool. When cellulose is pneumatically installed it takes on almost liquid-like properties that let it flow into cavities and around obstructions to completely fill walls and seal every crack and seam. No fiber glass or rock wool material duplicates this action. Liquid-applied foam plastics do, but they cost much more than cellulose.
All residential structures contain large amounts of wood. Cellulose insulation is the only wood-based building material that is always treated for fire retardancy. This makes cellulose insulation one of the safest materials used in home construction.
If a fire occurs, the dense structure of cellulose with its fire retardants are proven to slows the spread through the building by blocking flames and hot gases and by restricting the availability of oxygen in insulated walls and ceilings.
Scientist at the National Research Council report that “cellulose in the wall cavity provided an increase of the fire resistance performance from 22% to 55%, while fire roars right through fiberglass. The NRCC study showed that “the fire resistance of fiber-glass insulation was only slightly lower than that of a non-insulated assembly.
Test at the Omega Point Laboratories included that cellulose in a wall increased fire resistance from 26% to 77% when compared with uninsulated walls! Several fire demonstrations have been conducted to show cellulose insulated structures have remained virtually intact while uninsulated and fiberglass insulated structures have burned to the ground at a faster rate of time. (See video below)
"I just wanted to say the guys from WeatherMasters did a great job on my home. They were very professional and fast, but at the same time they took the time to explain what was being done and why. I will be calling this company in the future and will certainly recommend them ever chance I get. God Bless you all!"
Robert Ikerd, Bloomington, IN