Fiberglass Attic Insulation R Value

Where you live different climates require different insulation r values.

Fiberglass attic insulation r value.

Installing fiberglass attic insulation first time adding insulation to an attic. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. Spray foam pink fiberglas vs. As a benchmark one inch of solid wood has an r value of 1.

Houses in a cold climate should have a minimum of r 49 in the attic which is equivalent to approximately 16 of fiberglass insulation. The higher the r value the better the thermal performance of the insulation. First you ll need to determine your r value. This calculator is to be used as an estimating tool only.

Insulation project calculator how to install naima r value certification product training videos colab learning video library for pros distributor locator why owens corning insulation propink vs. Johns manville attic protector formaldehyde free premium blow in fiberglass insulation offers effective thermal and acoustical performance. Use the energy code map to help determine r value for your region. Your home s age if your home is more than 10 year old you likely need more insulation.

Warmer climates only require an r 38 or higher or about 12 or more. We ll walk you through the steps to help you find the right type of fiberglass attic insulation and the right amount. Insulation level are specified by r value. 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 in your attic to reach r 30 if you live in zones 2 or 3.

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 table below shows what levels of insulation are cost effective for different climates and. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. You will need a higher r value of insulation if you live in the northeast than if you live in southern california.

R value is a measure of insulation s ability to resist heat traveling through it. Thermafiber residential mineral wool insulation commercial grade at home thermafiber residential mineral wool blankets are ideal for insulating walls floor ceilings and attic spaces in homes. These products provide a high r value inch excellent sound attenuation characteristics and outstanding fire performance. Installed with a portable blowing machine it s perfect for covering hard to reach areas within attics and provides a more efficient installation for homeowners or remodeling.

There are many ways to retrofit a home with fiberglass and. Input depth of existing blown in insulation in inches.