Recommended insulation levels for retrofitting existing wood framed buildings.
Attic insulation below minimum level.
First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation.
The ceilings of storage attics are often quite low and as wasting expensive space is undesirable the insulation used for the space should be chosen carefully to avoid unnecessary reduction of space.
Existing 3 4 inches of insulation.
Your attic should have a certain amount of insulation in it and the recommended level of insulation for your attic is dependent on where you live.
Add the right kind of insulation when adding additional insulation you do not have to use the same type of insulation that currently exists in your attic.
In zone 4 the average minimum requirement for attic insulation is 11 inches of r38 fill.
The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type.
Add insulation to attic.
In zone 3 the average minimum requirement for attic insulation is 9 inches of r30 fill.
Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.
Inspecting your attic insulation.
The average recommended level is 17 inches of r60.
Improve air quality with the passage of time dust dirt mold and other pollutants can accumulate in your home through air leaks as a result of poor insulation.
The average recommended level is 17 inches of r60.