Foam Sheathing For That Addition or For Siding Replacements

Foam sheathing isn't used much in home remodeling, though it should be.

As of only a few years ago, wood-only sheathing was installed on 3/4 of all new homes.  For remodels, that number was far less.

Foam sheathing ranges from:

• The Low:  Thin sheathing that installs directly onto existing wood sheathing.  Its R-value is negligible, but it is effective at blocking air and water infiltration.  All the way up to...
• The High:  Thick, one-inch structural sheathing that installs directly onto the studs (no wood sheathing needed) and with an R-value of 5.  That's the sheathing you see in the picture above, Styrofoam brand from Dow Chemical.

Image:  (c)  Dow