Best Insulation For Walls R Value

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.

Best insulation for walls r value.

3 1 2 inches two by four 2x4 stud walls. Note from this chart that the ideal r value differs for each part of your home. 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. The table below shows what levels of insulation are cost effective for different climates and.

Appropriate for this wall type. The ideal attic insulation r value is different than the ideal wall insulation r. Insulation level are specified by r value. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.

R value is a measure of insulation s ability to resist heat traveling through it. However homeowners may have a different preference based on budget. 3 1 2 inches two by four 2x4 stud walls. See the department of energy s doe ranges for recommended levels of insulation below.

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 in your attic to reach r 30 if you live in zones 2 or 3. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. The higher the r value the better the thermal performance of the insulation. 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. 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.