Recommended Attic Insulation R Value

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.

Recommended attic insulation r value.

Square footage of your attic. 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. On this chart each part of the country is divided into different zones and each zone has a recommended r value.

The higher the r value the better the thermal performance of the insulation. 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. See the department of energy s doe ranges for recommended levels of insulation below. The main factors that impact the cost are.

Inspecting your attic insulation will help you determine your insulation needs. It refers to a particular insulation s ability to resist heat flow. 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. 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.

Achieving greater r values in exterior walls. Sacramento and most of california are in zone 3 which requires attic insulation with an r value between 30 and 60. 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.

According to home advisor insulating your attic can cost between 1700 to 2100. Recommended insulation levels for retrofitting existing wood framed buildings. R values vary based on. The higher the value the more insulating ability the product has.

To achieve a higher attic insulation r value simply add another layer of insulation. Add insulation to attic. Contractor or insulation installer s fee. Type and material of your insulation.

The recommended r value for attic insulation in ontario is between r 50 and r 60. R value is an efficiency rating for insulation. 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. That s where this nifty energystar chart comes in handy.