Recommended R Value Insulation For Walls

House insulation recommended r values 1.

Recommended r value insulation for walls.

This is supplied in a roll and in widths suitable to be fitted between the joists on the attic floor the roll. Recommended home insulation r values. The table below shows what levels of insulation are cost effective for different climates and. Extremely northern regions and high elevations are zone 5 requiring r 15 to r 19 values.

R value is a measure of insulation s ability to resist heat traveling through it. 3 1 2 inches two by four 2x4 stud walls. 3 1 2 inches two by four 2x4 stud walls. 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.

See the department of energy s doe ranges for recommended levels of insulation below. Ensuring your insulated spaces have the correct r value depends on a few factors including your province city and zone. Appropriate for this wall type. 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.

6 1 4 inches two by six 2x6 stud walls. Best insulation for 2x4 and 2x6 wall studs. 3 1 2 inches two by four 2x4 stud walls with true 4 inch depth. 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 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. You can achieve better thermal performance in your attic by adding an additional layer of insulation. 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.

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. Zones 3 and 4 include the midwest and northern regions requiring r 10 to r 19 values. The higher the r value the better the thermal performance of the insulation. 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. Insulation level are specified by r value. The higher the r value the better the thermal performance of the insulation.