Dense Pack Cellulose Insulation R Value

It has been unfairly criticized for its settling issues mold issues and its flammability.

Dense pack cellulose insulation r value.

But air leakage through cracks voids and gaps is important responsible for approximately one third of an average home s heat loss. There are four types of cellulose insulation blow in loose fill spray on and dense pack. The r value of wet spray and dense pack cellulose insulation depends slightly on its installed density and the exact type of cellulose used but commonly ranges between 3 6 and 3 8 per inch 1 as measured by the standard astm c518 test. 3 normally i keep quiet and move on but sometimes the nonsense can result in real damage particularly the stuff about dense.

The r value per inch decreases slightly as density is increased from 3 0 to 4 0 lbs ft3. Dense pack cellulose insulation total average cost per square foot. However it is seldom used in canada despite its reasonable cost and efficiency. Dense pack cellulose insulation installation cost.

Cellulose insulation has an r value range of 3 6 to 3 8. Cellulose is a superb air blocker. It can often be installed over existing insulation without removing the old insulation letting you reach the necessary r value with no fuss. Dense pack cellulose insulation total.

Like many insulation materials it provides an r value of approximately r 3 5 per inch of thickness. Loose filled sanctuary loose fill can also be blown in or dense packed into walls and floors and it works great in attics. Reduction in r value from 3 4 at 2 5 lbs ft3 to 3 3 at 4 5 lbs ft3 but insignificant. I love cellulose insulation.

1 in fact i love all insulations. Methods and verification of density national weatherization conference. Dense packed cellulose insulation provides excellent thermal resistance an r value of 3 0 3 5 per inch sound proofs the wall and greatly retards air flow. 2 but it irritates the heck out of me when folks say stuff that is not true particularly salesmen.

There is no such thing as a bad insulation only bad applications. When cellulose is densely blown 3 0lbs ft3 or 48kg m3 or greater it is an excellent wall cavity insulation that provides a good r value at a reasonable cost. The more insulation the better. Like wool insulation cellulose is frequently used for residential buildings.