Attic Insulation Depth

For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed your attic to reach r 30 if you live in zones 2 or 3.

Attic insulation depth.

Insulation fibers are packaged in bags and blown in place to the desired depth and density using special machinery you can rent from a home center. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. In temperate coastal areas such as zone 3 attic insulation of at least r30 up to a maximum of r60 is recommended. Measure the area needing insulation.

The higher the r value the better the thermal performance of the insulation. Click the button to calculate the approximate r value for this job. Calculate additional insulation needed. If your current insulation is only 5 inches deep you ll need to add seven inches of insulation to achieve the 12 inch r 38 rating.

Greenfiber cellulose insulation fills gaps and voids to create an energy saving thermal blanket that can lower heating and cooling costs by 25 and reduce sound power by 60. Measure the depth of your current insulation. Bag of all borate contractor grade 30 lb. Shop insulation accessories.

Having the correct amount of attic insulation can help you maintain a comfortable temperature throughout your home and help save money on your energy bills plus prevent major issues like ice dams in the winter. Now that you ve air sealed your attic and basement check your attic insulation levels and add more if necessary. Insulation level are specified by r value. Please enter depth in inches please enter depth in inches.

Bag of all borate insulation is ideal for professional contractors that offer blow in attic sidewall and floor applications. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. R 38 is the industry standard and the minimum thickness for r 38 is 12 inches. The table below shows what levels of insulation are cost effective for different climates and locations in the home.

You can pour the fill in place and spread it manually but the process is much more labor intensive and the results won t be nearly as good. Input depth of existing blown in insulation in inches. This calculator is to be used as an estimating tool only. 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.

It works best for. R value is a measure of insulation s ability to resist heat traveling through it. The attic is the easiest place to add insulation to improve your comfort and the energy efficiency of your home.