Painted closet shelves
Sanded or cabinet-grade plywood can work; choose by flatness, edge quality, and expected load.
Plywood Grades Explained
Plywood grade tells you mostly about face quality, not whether a sheet is right for every job. Strength, core, glue rating, and thickness still matter.
Plywood Grade Examples
Garage sheathing
Use rated sheathing. A prettier cabinet sheet is not necessary for hidden structural work.
Stained bookcase
Face veneer quality matters more because paint will not hide color and grain mismatch.
What the Grade Letters Mean
- A face: smooth, paintable or stainable, with few visible defects
- B face: mostly smooth with small repairs or tight knots
- C face: more knots, patches, sanding variation, and visible defects
- D face: rougher defects and knots, typically for hidden structural use
- Two letters describe the two faces, so AC plywood has one better face and one rougher back
Cabinet-Grade vs Sheathing
- Cabinet-grade plywood prioritizes attractive faces, flatter panels, and cleaner edges
- Sanded plywood is useful for painted utility projects when both faces do not need to be premium
- CDX is construction sheathing for roofs, walls, and subfloors; it is not a cabinet-grade finish sheet
- Exterior-rated plywood uses glue suitable for moisture exposure, but the face may still be rough
- Marine plywood is about void control and water-resistant construction, not magic waterproofing
Buying Checklist
- Check both faces before loading the sheet
- Look along the edge for core voids if the edge will be exposed
- Confirm the glue exposure rating for damp or exterior projects
- Pick a face veneer that matches your paint or stain plan
- Bring your cut list so you can avoid defects in visible parts
Common Questions
What does AC plywood mean?
AC plywood has one higher-quality A face and one C-grade back. It can be useful when only one face will be visible.
Is CDX plywood good for cabinets?
Usually no. CDX is construction sheathing. For cabinets, use cabinet-grade, sanded, birch, maple, oak, or another sheet intended for visible work.
Does cabinet-grade plywood mean waterproof?
No. Cabinet-grade describes finish quality more than moisture rating. Check the exposure rating and seal edges for damp areas.
Related Wood and Plywood Resources
Plan This Project in ChatDIY
Use ChatDIY to compare plywood grades against your project load, finish, moisture, and cut-list constraints.