Insulation level are specified by r value.
Recommended r value insulation for walls.
Best insulation for 2x4 and 2x6 wall studs.
Ensuring your insulated spaces have the correct r value depends on a few factors including your province city and zone.
6 1 4 inches two by six 2x6 stud walls.
House insulation recommended r values 1.
You can achieve better thermal performance in your attic by adding an additional layer of insulation.
3 1 2 inches two by four 2x4 stud walls with true 4 inch depth.
See the department of energy s doe ranges for recommended levels of insulation below.
Extremely northern regions and high elevations are zone 5 requiring r 15 to r 19 values.
The higher the r value the better the thermal performance of the insulation.
For example if you install r 19 fiberglass batts in 2x6 frame walls with the studs 16 inches on center double top plates and other elements of standard framing the actual r value of the whole wall with the r 19 insulation will be about r 15.
The higher the r value the better the thermal performance of the insulation.
3 1 2 inches two by four 2x4 stud walls.
These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.
The table below shows what levels of insulation are cost effective for different climates and.
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.
External wall insulation is carried out using insulating boards that are attached to the walls.
Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system.
For example a wall with 3 fiberglass batting r value of 10 8 11 9 may have an overall r value of nearly 14 because of siding sheathing and drywall.
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.
These recommendations are for true r values not the nominal values listed on insulation packaging.
Appropriate for this wall type.
This is supplied in a roll and in widths suitable to be fitted between the joists on the attic floor the roll.
For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed your attic to reach r 30 if you live in zones 2 or 3.
Different areas of your home also require different r values in order to make sure your floors ceilings and walls are insulated correctly and efficiently.
Generally zones 1 and 2 cover the southern states which suggest no necessary values to r 10 for basement walls.
Achieving greater r values in exterior walls.
Zones 3 and 4 include the midwest and northern regions requiring r 10 to r 19 values.
