Recommended Attic Insulation R Value

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.

Recommended attic insulation r value.

R values vary based on. The main factors that impact the cost are. To achieve a higher attic insulation r value simply add another layer of insulation. On this chart each part of the country is divided into different zones and each zone has a recommended r value.

Recommended insulation levels for retrofitting existing wood framed buildings. Contractor or insulation installer s fee. See the department of energy s doe ranges for recommended levels of insulation below. The r value of the insulation for every inch of thickness depends on the type of insulation.

You can achieve better thermal performance in your attic by adding an additional layer of insulation. Square footage of your attic. Add insulation to attic. Inspecting your attic insulation will help you determine your insulation needs.

The higher the value the more insulating ability the product has. That s where this nifty energystar chart comes in handy. Existing 3 4 inches of insulation. According to home advisor insulating your attic can cost between 1700 to 2100.

Let s say the insulation you ve selected has an r value of three per inch and. The higher the r value the better the thermal performance of the insulation. 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. It refers to a particular insulation s ability to resist heat flow.

Type and material of your insulation. 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. The recommended r value for attic insulation in ontario is between r 50 and r 60.

The correct amount can help maintain a comfortable temperature and save money. 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. In particularly cold climates you might go up to r 60. 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.