Recommended Attic Insulation R Value

The r value of the insulation for every inch of thickness depends on the type of insulation.

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. Type and material of your insulation. Existing 3 4 inches of insulation.

See the department of energy s doe ranges for recommended levels of insulation below. 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. That s where this nifty energystar chart comes in handy. 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.

Achieving greater r values in exterior walls. The correct amount can help maintain a comfortable temperature and save money. You can achieve better thermal performance in your attic by adding an additional layer of insulation. Square footage of your attic.

Let s say the insulation you ve selected has an r value of three per inch and. Contractor or insulation installer s fee. The higher the value the more insulating ability the product has. In particularly cold climates you might go up to r 60.

R value is an efficiency rating for insulation. Sacramento and most of california are in zone 3 which requires attic insulation with an r value between 30 and 60. Add insulation to attic. 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.

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. 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. According to home advisor insulating your attic can cost between 1700 to 2100. In general an attic s r value should be between r 30 and r 49.

The main factors that impact the cost are. The recommended r value for attic insulation in ontario is between r 50 and r 60. Recommended insulation levels for retrofitting existing wood framed buildings. The higher the r value the better the thermal performance of the insulation.