How Much Insulation Necessary For Attic

According to the u s.

How much insulation necessary for attic.

The average recommended level is 14 inches of r49. In zone 1 the average minimum requirement for attic insulation is 9 inches of r30 fill. If your attic insulation is only a few inches thick or if you can see the ceiling joists you re wasting money on your heating and cooling bills. Deciding how much insulation your attic needs is a matter of knowing the r value of your insulation material and the total r value you need your attic to meet then purchasing enough material to make the equation work.

Dallas texas falls in climate zone three where attics are recommended to have an r value between 38 49 this means a minimum of 12 of insulation. It is not uncommon to see 15 to 20 of insulation in a well insulated attic. According to home advisor insulating your attic can cost between 1700 to 2100. Add the right kind of insulation.

The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. The higher the r value the better the thermal performance of the insulation. How much insulation do i need in my attic. The insulation in your attic should be at least 12 thick.

If your insulation doesn t measure up and you need more installation can be done as a weekend diy project or you can call a professional installer to handle the job. Department of energy it s recommended that attics have an r 38 to r 49 or about 12 to 15 of fiberglass or cellulose insulation. Contractor or insulation installer s fee. The average recommended level is 17 inches of r60.

In zone 2 the average minimum requirement for attic insulation is 9 inches of r30 fill. The thicker the better. Type and material of your insulation. 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.

Square footage of your attic. The main factors that impact the cost are. Use unfaced insulation when adding more insulation to an attic that already has some insulation laying the rolls or batts at right angles to the floor joists. Click the button to calculate the depth in inches and pounds of total insulation required for this job.