There are many areas in the country where plywood or OSB sheathing is required only at exterior corners and every 25 ft. along exterior walls. This allows you to install nonstructural sheathing material everywhere else. On this house, we used /fi-in. foam sheathing. The foam board is light and easy to handle, though it can be damaged by a stray hammer blow or by someone stepping on it. Attach foam sheathing with l’/Tin. roofing nails. Sheathe right over window openings, then go inside the house with a handsaw and cut out the foam from the openings (see the right photo on p. 109).
If you’ve come this far, congratulations!
Make sure you spend some time cleaning up the job site at this point in your project. There are bound to be plenty of offcuts, such as 2x stock, plywood or OSB scraps, and stray fragments of foam sheathing. Remove the debris and get set to raise the roof.
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