Recommended Attic Insulation R Value

That s where this nifty energystar chart comes in handy.

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. You can achieve better thermal performance in your attic by adding an additional layer of 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. The higher the r value the better the thermal performance of the insulation.

In general an attic s r value should be between r 30 and r 49. R value is an efficiency rating for insulation. The higher the value the more insulating ability the product has. 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.

Add insulation to attic. Recommended insulation levels for retrofitting existing wood framed buildings. See the department of energy s doe ranges for recommended levels of insulation below. Square footage of your attic.

Achieving greater r values in exterior walls. According to home advisor insulating your attic can cost between 1700 to 2100. In particularly cold climates you might go up to r 60. On this chart each part of the country is divided into different zones and each zone has a recommended r value.

Inspecting your attic insulation will help you determine your insulation needs. Let s say the insulation you ve selected has an r value of three per inch and. To achieve a higher attic insulation r value simply add another layer of insulation. The recommended r value for attic insulation in ontario is between r 50 and r 60.

Contractor or insulation installer s fee. It refers to a particular insulation s ability to resist heat flow. 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 correct amount can help maintain a comfortable temperature and save money.

Sacramento and most of california are in zone 3 which requires attic insulation with an r value between 30 and 60. R values vary based on. The main factors that impact the cost are. Type and material of your insulation.