Spray Cellulose Insulation R Value

These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.

Spray cellulose insulation r value.

When walls are already finished injecting loose fill cellulose insulation is one of the few ways of adding. As a benchmark one inch of solid wood has an r value of 1. Input depth of existing blown in insulation in inches. Both of these insulation products carry a 3 6 to 3 7 r value per inch.

The boric acid in the insulation can provide a form of pest control. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and an inch of blown cellulose in an attic has an r value of 3 2 3 7. 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. 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.

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. Mcglaughlin insulation recognizes that you may not have experience with either type of insulation and we re ready to help. Click the button to calculate the approximate r value for this job. Given that both insulators are equal in r value the difference in thermal resistance relies heavily on proper installation and air sealing.

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. 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. This calculator is to be used as an estimating tool only. 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. 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. 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. The r value per inch decreases slightly as density is increased from 3 0 to 4 0 lbs ft3.

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. Actually foam insulation doesn t have an appreciable higher r value than cellulose insulation.