Spray Cellulose Insulation R Value

The r value of cellulose insulation ranges from 3 6 3 8 per inch and spray foam insulation ranges from 3 5 3 7 per inch of insulation.

Spray cellulose insulation r value. Input depth of existing blown in insulation in inches. The r value per inch decreases slightly as density is increased from 3 0 to 4 0 lbs ft3. If the budget is slim he opts for blown in fiberglass and dense pack cellulose but even then he uses spray foam under the roofline. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system.

Click the button to calculate the approximate r value for this job. Keep in mind that cellulose has a lower r value than spray foam though it is still a highly effective method of insulating your home. When walls are already finished injecting loose fill cellulose insulation is one of the few ways of adding. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.

Mcglaughlin insulation recognizes that you may not have experience with either type of insulation and we re ready to help. 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 as measured by the standard astm c518 test. Loose fill cellulose insulation can settle around and conform to most of the obstructions found in walls and attics. 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.

Icynene s paul duffy says that builders who balk at foam because of cost are evaluating the product incorrectly. Given that both insulators are equal in r value the difference in thermal resistance relies heavily on proper installation and air sealing. Loose fill cellulose is relatively inexpensive yet still has an r value of about 3 5 per inch of thickness compared to fiberglass r value between r3 to r4 per inch. Both of these insulation products carry a 3 6 to 3 7 r value per inch.

Find your zone on the map and then use the above insulation r value chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces. To make matters worse foam insulation is rarely installed to completely fill the wall cavities because in so doing it requires much more 1 labor expense to shave flush with. If you re replacing r value with r value it s the most expensive product duffy admits. The r value per inch decreases slightly as density is increased from 3 0 to 4 0 lbs ft3.

Actually foam insulation doesn t have an appreciable higher r value than cellulose insulation. This calculator is to be used as an estimating tool only.