Attic Insulation R Value Map

Also included is the hugely helpful insulation zip code calculator that spells out the suggested amount of r value necessary for the different portions of a structure like foundation interior and.

Attic insulation r value map.

For houses in the northeastern united states or other colder areas you might need attic insulation with an r value as high as r 60. You will need a higher r value of insulation if you live in the northeast than if you live in southern california. For houses in a southwestern state or other areas with generally warmer temperatures you might need attic insulation with an r value of only r 30. The r value of some insulations also depends on temperature aging and moisture accumulation.

See the department of energy s doe ranges for recommended levels of insulation below. In order to comprehend how insulation works it helps to understand that the three main. 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. R38 divided by r3 2 cellulose 11 875 loose fill insulation thickness.

There are many ways to retrofit a home with fiberglass and. The r value can be substantially lowered if the material becomes moist or wet. Installing more insulation in your home increases the r value and the resistance to heat flow. Where you live different climates require different insulation r values.

Recommended home insulation r values. 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. To find out how much attic insulation you need for a home located in 4 zone without any existing attic floor insulation according to the table recommended minimum r value is r38 wee need to perform this simple calculation. The higher the r value the better the thermal performance of the insulation.

The map and chart show each region of the u s the subsequent zones and corresponding r values. R value insulation chart find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces. Insulation level are specified by r value. Included is our r value guide detailing the suggested amount of insulation dependent upon zone as provided by the u s.

R value is a measure of insulation s ability to resist heat traveling through it. The table below shows what levels of insulation are cost effective for different climates and.