Insulating Your Walls

Properly insulated walls will reduce energy loss and increase savings for the life of the home. And insulating your walls also helps control noise transmission from room to room.

What’s your R-value?

Below are the U.S. Department of Energy recommended minimum R-values for your climate zone.

Your Climate Zone: 4

    Attics 2x4 Walls 2x6 Walls Floors Crawlspaces
Zone 4 R38 to R60 R13 to R15 R19 to R21 R25 to R30 R25 to R30

Choosing the Right Insulation

Fiberglass insulation is sold in roll and batt form; both are available with or without kraft paper facing. Use the guide below to select the best insulation for your project.

  • Rolls

    Continuous rolls are easy to transport and can be cut to length; great for large areas.

  • Batts

    Batts come in pre-cut lengths for faster installation and each package contains more square feet than rolls; ideal for framed cavities.

  • Faced

    Faced insulation uses kraft paper vapor barriers to control moisture transmission between walls and floors.

  • Unfaced

    Unfaced insulation does not have a vapor barrier; can be used over existing insulation in the attic, or where moisture control is not needed.

  • High–Performance

    All purpose insulation combining the benefits of improved air quality, fire resistance, sound absorption and outstanding thermal performance.

To calculate how much you need:

Calculate Your Square Footage

Enter the square footage associated with your walls below.

A: Length of all walls added together

B: Height of wall

Your Square Footage: Sq Ft.

Recommended Products

The following products are recommended for use in walls. Add items to your list, and you’ll be able to view, print or email your checklist when you’re done.

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Installation Tips

Installation Instructions

New Construction

Standard Walls

Insulation should fit snugly within the framing cavity without any gaps or voids between the edges of the batt and the framing members. Even the smallest openings between framing members should be insulated.

2" x 6" Walls

For optimum thermal performance, walls with 2" x 6" framing should be filled with R-21 high-density insulation. 5½" thick R-21 high-density insulation delivers 19% more R-value than 6¼" R-19 fiberglass insulation.

2" x 4" Walls

For optimum thermal performance walls with 2" x 4" framing should be filled with R-15 high-density insulation. 3½" thick R-15 high-density insulation delivers 36% more R-value than standard R-11 fiberglass insulation.

Existing Homes

Insulating walls of existing homes is a difficult task. Either insulating from the outside or inside requires removal of the existing materials. Another option for this project is to use the AttiCat® Blown-In Wall System solution in existing homes.

Interior Walls

Interior walls may be insulated and help reduce noise transmission between rooms. Installing insulation in your interior walls can offer you quieter, more peaceful living conditions. Use unfaced insulation for your interior wall application.

NOTE: Do not leave faced insulation exposed. The facings on kraft-faced insulation will burn and must be installed in substantial contact with an approved interior finish as soon as the insulation has been installed. Facing must be installed in substantial contact with an approved ceiling, floor or wall material. Keep open flame and other heat sources away from facing. See package for warnings, fire hazard and instructions, or call 1-800-GET-PINK®. Check your local building codes for requirements in your area.

Basic Tools

  • Tape measure
  • Utility knife
  • Straightedge or 2 x 4 (for cutting insulation)
  • Lightweight, squeeze-type stapler

Protective Gear

  • Work gloves
  • Loose-fitting, long-sleeved shirt
  • OSHA-approved safety glasses
  • Disposable dust mask

Special Equipment

  • Portable work light


Before you begin any insulation project make sure you:

  • Seal any open penetrations
  • Gather the necessary tools and wear protective gear listed above
  • Always use a portable work light to ensure you have enough light in your work environment
  • Leave EcoTouch® PINK® insulation in its wrapper until you are ready to use it
  • Packaged insulation is highly compressed and expands greatly when the wrapper is opened

Owens Corning is fully committed to safety and believes accidents are preventable. Please join us by promoting safety where you live and work.