Recommended Attic Insulation R Value

The higher the value the more insulating ability the product has.

Recommended attic insulation r value. The higher the r value the better the thermal performance of the insulation. To achieve a higher attic insulation r value simply add another layer of insulation. That s where this nifty energystar chart comes in handy. 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.

On this chart each part of the country is divided into different zones and each zone has a recommended r value. The r value of the insulation for every inch of thickness depends on the type of insulation. Achieving greater r values in exterior walls. Recommended insulation levels for retrofitting existing wood framed buildings.

Square footage of your attic. 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. In general an attic s r value should be between r 30 and r 49. The correct amount can help maintain a comfortable temperature and save money.

In particularly cold climates you might go up to r 60. See the department of energy s doe ranges for recommended levels of insulation below. Let s say the insulation you ve selected has an r value of three per inch and. 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.

Type and material of your insulation. R values vary based on. 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. The main factors that impact the cost are.

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. Inspecting your attic insulation will help you determine your insulation needs. It refers to a particular insulation s ability to resist heat flow. According to home advisor insulating your attic can cost between 1700 to 2100.

You can achieve better thermal performance in your attic by adding an additional layer of insulation. Existing 3 4 inches of insulation. R value is an efficiency rating for insulation. The recommended r value for attic insulation in ontario is between r 50 and r 60.