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Manufacturer's Product Description
Designed to minimize the waviness often associated with installed lap siding, Stedi-R regular fiberboard sheathing allows water vapors to pass through the wall cavity, rather than being trapped within the wall. Stedi-R regular sheathing is available in thicknesses of 1/2", and in sheet sizes of 4' x 8' and 4' x 9'. It is also available coated on six sides.