Highest R Value Insulation For Exterior Walls

The table below shows what levels of insulation are cost effective for different climates and.

Highest r value insulation for exterior walls.

The higher the r value the better the thermal performance of the insulation. One inch thick rigid insulation can generally be attached to the outside of the structural sheathing without adding additional. That indicates which value is best for each region. Home depot provides a map of the u s.

Install sufficient exterior rigid insulation on a single frame wall to achieve the necessary insulating value. Fiberglass vats are the standard insulator for 2 inch by 4 inch wall framing and are rated r 11 through r 15. Best insulation for 2x4 and 2x6 wall studs. In order to achieve the higher insulation r value of r 21 a different type of.

Use r 19 or r 21 kraft faced fiberglass insulation for two by six 2x6 walls. Insulation level are specified by r value. If your exterior walls are constructed from 2 by 4 inch studs the most insulation that can go into the wall while retaining its r value is r 13 or r 15 as these are both made to fit a cavity 3 1 2 inches deep. For every type and material of insulation check the r value per inch of thickness that the manufacturer has listed.

A higher insulation r value usually means a higher price point as well. Typically a higher insulation r rating means better climate control and better energy efficiency for your home. While wall insulation is limited by the width of the studs different materials provide higher or lower r values. This combination ensures that the insulation is neither too loose nor too tightly packed within the walls.

See the department of energy s doe ranges for recommended levels of insulation below. Fiberglass batts for standard 2 4 walls are now available in low medium and high density products that range from r 11 to r 15. The r value of insulation indicates how well it resists heat and according to home depot the higher the r value the greater the insulation performance what is the ideal r value for exterior walls. Recommended home insulation r values.

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 higher the r value the better the thermal performance of the insulation. R value is a measure of insulation s ability to resist heat traveling through it.