Recommended Attic Insulation R Value

Square footage of your attic.

Recommended attic insulation r value.

Add insulation to attic. According to home advisor insulating your attic can cost between 1700 to 2100. See the department of energy s doe ranges for recommended levels of insulation below. But newer homes in central and southern arizona are insulated to ratings of r 30 to r 38 while newer homes in northern arizona generally have attic insulation at r 60 because of colder winters.

Existing 3 4 inches of insulation. The correct amount can help maintain a comfortable temperature and save money. The recommended r value for attic insulation in ontario is between r 50 and r 60. Achieving greater r values in exterior walls.

The main factors that impact the cost are. Recommended insulation levels for retrofitting existing wood framed buildings. In general an attic s r value should be between r 30 and r 49. R values vary based on.

R values of common types of insulation the two distinct types of attic insulation are loose fill material also commonly known as blown in insulation and batting. On this chart each part of the country is divided into different zones and each zone has a recommended r value. You can achieve better thermal performance in your attic by adding an additional layer of insulation. The r value of the insulation for every inch of thickness depends on the type of insulation.

The higher the value the more insulating ability the product has. If you think you re among the 90 of us homes that are under insulated 1 performing a simple insulation inspection will help you determine your insulation needs. Depending on where you live and the part of your home you re insulating walls crawlspace attic etc you ll need a different r value. Let s say the insulation you ve selected has an r value of three per inch and.

Type and material of your insulation. It refers to a particular insulation s ability to resist heat flow. Sacramento and most of california are in zone 3 which requires attic insulation with an r value between 30 and 60. In particularly cold climates you might go up to r 60.

Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces. Contractor or insulation installer s fee. The higher the r value the better the thermal performance of the insulation. Inspecting your attic insulation will help you determine your insulation needs.