How Many Inches Of Insulation In The Attic Equals R45

In temperate coastal areas such as zone 3 attic insulation of at least r30 up to a maximum of r60 is recommended.

How many inches of insulation in the attic equals r45.

This calculator is to be used as an estimating tool only. This calculator is to be used as an estimating tool only. 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. 12 inches thick 13 0 20 to 0 40 0 02 30 0 60 to 1 00 0 03.

Types of insulation insulation comes in many different forms some of which are listed below. Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces. 5 5 inches a nominal 6 inches is allowed in attics and crawlspaces. The company claims that there is an alternate way to evaluate the insulation value provided by.

As a benchmark one inch of solid wood has an r value of 1. We don t see how an adequate r value can be provided in attics for our area. Click the button to calculate the depth in inches and pounds of total insulation required for this job. That is about 13 to 15 inches of blown insulation.

Attic existing 3 4 inches of insulation uninsulated floor uninsulated wood frame wall insulated. In the far north the code minimum for new homes is as high as r 44. For loose fill cellulose this translates to a total depth ranging from 8 inches. What to do for your home.

Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. Input depth of existing blown in insulation in inches. The report gives an r value of 5 7 for the 1 6 inch thick test sample.