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CDX Plywood
CDX is one of the most economical grades of plywood, due mostly to the fact that it is left rough on
both sides. The C and the D are meant to describe the two sides of the sheet. The lower the letter,
the rougher the surface. So, A means the surface is a finish grade, while D means the surface is very
rough.
We stock CDX in two species: pine and fir. The pine is generally less expensive, and is also a little softer.
Both kinds are used as sheathing for homes, as well as other rough projects. Sheathing is the layer of
wood that is applied to the studs and framing of a house, usually on the walls and roof.
It is not unusual to see knots or to have "voids" with CDX plywood. (Voids are gaps within the layers of the
plywood, usually caused by knots or where edges of plys come together.) This is just another reason why CDX is
priced so low.
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