In most climates, you will save money and energy when you build a new home or addition if you install a combination of cavity insulation and insulative sheathing. Reduce exterior wall leaks by taping the joints of exterior sheathing and caulking and sealing exterior walls. Cavity insulation can be installed at levels up to R-15 in a 2 in. x 4 in. wall and up to R-21 in a 2 in. x 6 in. wall.

These help to reduce the energy that would otherwise be lost through the wood frame. The table on page 9 shows the recommended combinations. For more customized recommendations, see the ZIP Code Insulation Calculator at ornl.gov/~roofs/Zip/ZipHome.html.

Consider products that provide both insulation and structural support, such as structural insulated panels (SIPs), and masonry products like insulating concrete forms. Visit energysavers.gov for more information on structural insulation.

You should consider attic or roof radiant barriers (in hot climates), reflective insulation, and foundation insulation for new home construction. Check with your contractor for more information about these options.