Recommended Attic Insulation R Value

The main factors that impact the cost are.

Recommended attic insulation r value. To achieve a higher attic insulation r value simply add another layer of insulation. Inspecting your attic insulation will help you determine your insulation needs. The higher the r value the better the thermal performance of the insulation. It refers to a particular insulation s ability to resist heat flow.

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. 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. Existing 3 4 inches of insulation. According to home advisor insulating your attic can cost between 1700 to 2100.

Contractor or insulation installer s fee. The r value of the insulation for every inch of thickness depends on the type of insulation. R values vary based on. 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.

On this chart each part of the country is divided into different zones and each zone has a recommended r value. In particularly cold climates you might go up to r 60. 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. You can achieve better thermal performance in your attic by adding an additional layer of insulation.

Let s say the insulation you ve selected has an r value of three per inch and. Achieving greater r values in exterior walls. Recommended insulation levels for retrofitting existing wood framed buildings. Sacramento and most of california are in zone 3 which requires attic insulation with an r value between 30 and 60.

See the department of energy s doe ranges for recommended levels of insulation below. Add insulation to attic. The higher the value the more insulating ability the product has. The correct amount can help maintain a comfortable temperature and save money.

In general an attic s r value should be between r 30 and r 49. The recommended r value for attic insulation in ontario is between r 50 and r 60. R value is an efficiency rating for insulation. Square footage of your attic.