CDX sheathing is a type of plywood that is frequently used in construction for its strength, durability, and cost-effectiveness. The term “CDX” refers to the plywood grade and composition, where the “C” and “D” represent the quality of the outer layers of veneer, and the “X” indicates the use of exterior-grade adhesive.
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What Do the Letters Mean?
The “C” veneer has noticeable imperfections like knots or splits, but it is sanded smooth to a degree, making it a good choice for areas where appearance isn’t a primary concern, such as subfloors or roofing. The “D” veneer, on the other hand, has more defects and is rougher but still provides enough structural integrity for construction purposes. The “X” adhesive is waterproof, ensuring that the plywood can withstand exposure to moisture and weather during the construction process, making it suitable for outdoor use.
Common Applications
One of the most common applications for CDX sheathing is in roofing, where the plywood serves as the base layer before shingles or other roofing materials are applied. It’s also commonly used in wall and floor sheathing to provide structural support. The plywood sheets are installed over the framing of the building, helping to stabilize and reinforce the structure.
Advantages of CDX Sheathing
CDX sheathing is valued for its strength and resilience, especially in environments where it may be exposed to the elements during construction. While it’s not fully waterproof, it is water-resistant enough to be used in areas that may be temporarily exposed to moisture before being covered by additional layers.
DIY Projects
CDX plywood can be used in some DIY projects where durability and affordability are important, such as for building sheds, outdoor furniture, or temporary structures. However, it’s important to note that because of its rough surface, it’s not typically used for projects where appearance is important unless it’s being covered by other materials.