What are Plywood Grades

Plywood grades come in four types, represented by the letters A, B, C, and D.

Grades are a reflection of the superficial or cosmetic qualities of the wood. Plywood rating refers to the quality and appearance of veneers, whereas plywood rating is meant to inform you about the structural integrity and use cases.

A-grade plywood is the best quality plywood. It will have a smooth, sanded surface with a visible grain but without knots.

Any defects are filled in with synthetic filler, meaning the veneer can be easily painted without much preparation work. A-grade plywood is for use cases that emphasize the look of the wood over its functional properties, meaning it is excellent for furniture.

B-grade is similar to A-grade plywood but will have defects. These defects must be minor and should measure no longer than 1-inch across. 

C-grade and D-grade are unsanded and have several minor defects and knots. These will require some repair work, with C-grade featuring knots up to 1 1/2-inches across and D-grade up to 2 1/2-inches.

C and D-grade plywood will often feature uneven discoloration, sanding defects, or otherwise obvious aesthetic issues. 

C-grade plywood is often used where it can’t be seen or its appearance is excessive, such as in subfloors or garages. D-grade is much the same but with more significant defects.

Sometimes plywood falls between two standards; for example, you may find ratings with mixed classifications, such as AB. This just means that one part or side of the wood meets the A grade, whereas the other side is only worthy of a B.

ZMADTO Plywood Co.Ltd. is focus on construction plywood & wood formwork product. Our factory was established in 1993 and covers an area of 240,000 square meters with an average daily output of more 30,000 pcs plywood. Besides, the factory has more than 200 advanced equipment. After years of continuous development, it has become a leading company in the international wood formwork industry and exported to more than 20 countries around the world.