Dense Pack Cellulose Insulation R Value

The r value per inch decreases slightly as density is increased from 3 0 to 4 0 lbs ft3.

Dense pack cellulose insulation r value.

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. Reduction in r value from 3 4 at 2 5 lbs ft3 to 3 3 at 4 5 lbs ft3 but insignificant. Cellulose is considered dense packed when it is around 3 6 lbs per cu ft. 3 normally i keep quiet and move on but sometimes the nonsense can result in real damage particularly the stuff about dense.

Cellulose is a superb air blocker. Dense pack cellulose insulation total. There is no such thing as a bad insulation only bad applications. 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.

Cellulose insulation has an r value range of 3 6 to 3 8. 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 average cost per square foot. Dense pack cellulose insulation installation cost.

There are four types of cellulose insulation blow in loose fill spray on and dense pack. Methods and verification of density national weatherization conference. 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. 2 but it irritates the heck out of me when folks say stuff that is not true particularly salesmen.

Like wool insulation cellulose is frequently used for residential buildings. Cellulose is not unusual in this regard. However it is seldom used in canada despite its reasonable cost and efficiency. It has been unfairly criticized for its settling issues mold issues and its flammability.

But air leakage through cracks voids and gaps is important responsible for approximately one third of an average home s heat loss. The more insulation the better. Because of the high density settling is not an issue. Like many insulation materials it provides an r value of approximately r 3 5 per inch of thickness.