Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.
Attic insulation r value zone 4.
Included is our r value guide detailing the suggested amount of insulation dependent upon zone as provided by the u s.
As a benchmark one inch of solid wood has an r value of 1.
Walls should be between r 19 to r 21 basement walls r13 to r 19.
Recommended home insulation r values.
In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and an inch of blown cellulose in an attic has an r value of 3 2 3 7 along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system.
Insulation level are specified by r value.
Existing attic 3 4 inches of insulation r 38.
The table below shows what levels of insulation are cost effective for different climates and.
R38 divided by r3 2 cellulose 11 875 loose fill insulation thickness.
R value is a measure of insulation s ability to resist heat traveling through it.
Floors r 25 to r 30.
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.
The higher the r value the better the thermal performance of the insulation.
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.