Highest R Value Insulation For Exterior Walls

6 1 4 inches two by six 2x6 stud walls.

Highest r value insulation for exterior walls.

As with attics or anywhere else in your home adding more layers of insulation to your exterior walls is key to having a higher r value and better thermal performance. 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. While wall insulation is limited by the width of the studs different materials provide higher or lower r values. If you need an r value of 21 to insulate your walls you would need about six or seven inches of fiberglass batts.

R value is a measure of insulation s ability to resist heat traveling through it. 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. 3 1 2 inches two by four 2x4 stud walls with true 4 inch depth. 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.

Appropriate for this wall type. Products with foil facing help the panels resist moisture vapor. Smaller sizes are also available. Fiberglass vats are the standard insulator for 2 inch by 4 inch wall framing and are rated r 11 through r 15.

Working with home insulation boards insulation panels typically come in 4x8 foot sheets. The table below shows what levels of insulation are cost effective for different climates and. Available in batts blankets rolls and loose fill fiberglass is the most ubiquitous insulation material in use today. In order to achieve the higher insulation r value of r 21 a different type of.

You only need four inches of r 3 5 cellulose in a wall cavity to exceed the recommended insulation level of r 13 for walls located in zone 4. Recommended home insulation r values. 3 1 2 inches two by four 2x4 stud walls. They re much lighter and easier to work with than plywood sheets.

Best insulation for 2x4 and 2x6 wall studs. Again though your insulation needs may differ depending on where you live. Insulation level are specified by r value. However homeowners may have a different preference based on budget.

Of all the materials sprayed foam offers the highest r value per inch. 3 1 2 inches two by four 2x4 stud walls. See the department of energy s doe ranges for recommended levels of insulation below.