Blown In Fiberglass Attic Insulation R Values

The table below shows what levels of insulation are cost effective for different climates and.

Blown in fiberglass attic insulation r values.

Fiberglass installation labor cost is about 1 00 to 2 75 per square foot based on the amount of insulation and the location. The r values of both insulations will accumulate. This calculator is to be used as an estimating tool only. Click the button to calculate the approximate r value for this job.

R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another. Spray foam insulation for both types starts at about 1 50 per square foot and can cost more than 5 00 per square foot when a thick application is applied. When you need to add insulation to an attic crawl space or walls of a home the fastest and most cost efficient method is to use blown in insulation. Johns manville attic protector formaldehyde free premium blow in fiberglass insulation offers effective thermal and acoustical performance.

R value is a measure of insulation s ability to resist heat traveling through it. 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. Blowing the insulation should take less than 1 5 hours and the whole job can be completed in less than 4 hours based on a 1 000 sq. Recommended home insulation r values.

The specially designed atticat machine conditions the insulation by adding millions of tiny air pockets that give the material its insulating power and energy saving r value over time. Loose fill insulation can be installed in either enclosed cavities such as walls or unenclosed spaces such as attics. 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. Cellulose fiberglass and rock wool are typically blown in by experienced installers skilled at achieving the correct density and r values.

The higher the r value the better the thermal performance of the insulation. As a benchmark one inch of solid wood has an r value of 1. Minimum suggested insulation values vary by geographic. Polystyrene beads vermiculite and perlite are typically poured.

The average cost of blown in insulation to achieve an r value of r 38 r 49 is 1 665 with most homeowners spending between 874 and 2 156 or 1 59 per square foot. One bag of attic protector provides 62 square feet of r 30 coverage. Insulation level are specified by r value.