Highest R Value Insulation For Exterior Walls

That indicates which value is best for each region.

Highest r value insulation for exterior walls.

R value is a measure of insulation s ability to resist heat traveling through it. Recommended home insulation r values. One inch thick rigid insulation can generally be attached to the outside of the structural sheathing without adding additional. See the department of energy s doe ranges for recommended levels of insulation below.

This combination ensures that the insulation is neither too loose nor too tightly packed within the walls. Best insulation for 2x4 and 2x6 wall studs. Use r 19 or r 21 kraft faced fiberglass insulation for two by six 2x6 walls. There are three methods of wall construction that lend themselves to high r walls at the least cost.

Install sufficient exterior rigid insulation on a single frame wall to achieve the necessary insulating value. The higher the r value the better the thermal performance of the insulation. 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. 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.

Fiberglass vats are the standard insulator for 2 inch by 4 inch wall framing and are rated r 11 through 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. While wall insulation is limited by the width of the studs different materials provide higher or lower r values. 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.

Achieving greater r values in exterior walls. Typically a higher insulation r rating means better climate control and better energy efficiency for your home. A higher insulation r value usually means a higher price point as well. For every type and material of insulation check the r value per inch of thickness that the manufacturer has listed.

The table below shows what levels of insulation are cost effective for different climates and. Home depot provides a map of the u s. The higher the r value the better the thermal performance of the insulation.